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Exchange Server vulnerabilities on March 2, 2021

Microsoft Defender has included security intelligence updates to the latest version of the Microsoft Safety Scanner (MSERT.EXE) to detect and remediate the latest threats known to abuse the Exchange Server vulnerabilities disclosed on March 2, 2021 Mar 02 2021 01:08 PM. Note: this post is getting frequent updates; please keep checking back. Last update: 3/19/2021. Microsoft has released a set of out of band security updates for vulnerabilities for the following versions of Exchange Server: Exchange Server 2013

CVE-2021-26858 Microsoft Exchange Server Remote Code Execution Vulnerability Known issues in this update When you try to manually install this security update by double-clicking the update file (.msp) to run it in normal mode (that is, not as an administrator), some files are not correctly updated On 2 March 2021 Microsoft released information regarding multiple exploits being used to compromise instances of Microsoft Exchange Server. Malicious actors are exploiting these vulnerabilities to compromise Microsoft Exchange servers exposed to the internet, enabling access to email accounts and to enable further compromise of the Exchange server and associated networks On 2 March 2021, Microsoft reported four critical vulnerabilities affecting Microsoft's Exchange server - a software used by organisations worldwide to manage their email, scheduling and collaboration. It was assessed that hackers had exploited these vulnerabilities to target organisations using the software as early as January 2021 On March 2, 2021, Microsoft released a blog post that detailed multiple zero-day vulnerabilities used to attack on-premises versions of Microsoft Exchange Server. Microsoft also issued emergency Exchange Server updates for the following vulnerabilities Key Points. On March 2, Microsoft said there were vulnerabilities in its Exchange Server mail and calendar software for corporate and government data centers. The vulnerabilities go back 10 years.

On March 2, the world was introduced to four critical zero-day vulnerabilities impacting multiple versions of Microsoft Exchange Server ( CVE-2021-26855, CVE-2021-26857, CVE-2021-26858 and CVE-2021-27065 ). Alongside revealing these vulnerabilities, Microsoft published security updates and technical guidance that stressed the importance of patching. Therefore, running March 2021 security tools and scripts will not mitigate the vulnerabilities fixed in April 2021. You should update your servers as soon as possible. Please note that if March EOMT is ran after April updates are installed, it will mistakenly mention that systems are possibly vulnerable (As EOMT is not aware of April updates)

Microsoft Exchange Server Vulnerabilities Mitigations

  1. CVE-2021-26855 is a server-side request forgery (SSRF) vulnerability in Exchange which allowed the attacker to send arbitrary HTTP requests and authenticate as the Exchange server. CVE-2021-26857 is an insecure deserialization vulnerability in the Unified Messaging service
  2. On March 2, Microsoft released emergency security updates to plug four security holes in Exchange Server versions 2013 through 2019 that hackers were actively using to siphon email communications.
  3. On Mar. 2, 2021, Volexity reported in-the-wild-exploitation of four Microsoft Exchange Server vulnerabilities: CVE-2021-26855, CVE-2021-26857, CVE-2021-26858 and CVE-2021-27065. As a result of these vulnerabilities being exploited, adversaries can access Microsoft Exchange Servers and allow installation of additional tools to facilitate long-term access into victims' environments

Released: March 2021 Exchange Server Security Updates

This update rollup provides a security advisory for Microsoft Exchange Server. To learn more about these vulnerabilities, see the following Common Vulnerabilities and Exposures (CVE): CVE-2021-26857 Microsoft Exchange Server Remote Code Execution Vulnerability. Known issues in this security updat Summary. On March 2, 2021, Microsoft released information about critical vulnerabilities in its Exchange Server 2013, 2016, and 2019. These vulnerabilities allow a remote attacker to take control over any Exchange server that is reachable via the internet, without knowing any access credentials On March 2, 2021, the Microsoft Threat Intelligence Center (MSTIC) released details on an active state-sponsored threat campaign exploiting four zero-day vulnerabilities in on-premises instances of Microsoft Exchange Server. MSTIC attributes this campaign to HAFNIUM, a group assessed to be state-sponsored and operating out of China On March 2, 2021, Microsoft has released emergency out-of-band security updates that address four zero-day issues (CVE-2021-26855, CVE-2021-26857, CVE-2021-26858, and CVE-2021-27065) in all supported MS Exchange versions that are actively exploited in the wild. Microsoft Threat Intelligence Centre (MSTIC) released details on an active state-sponsored threat campaign

Description of the security update for Microsoft Exchange

Microsoft has released alternative mitigation techniques for Exchange Server customers who are not able to immediately apply updates that address vulnerabilities disclosed on March 2, 2021. CISA and Microsoft encourages organizations to upgrade their on-premises Exchange environments to the latest supported version On March 2, 2021 several companies released reports about in-the-wild exploitation of zero-day vulnerabilities inside Microsoft Exchange Server. The following vulnerabilities allow an attacker to compromise a vulnerable Microsoft Exchange Server. As a result, an attacker will gain access to all registered email accounts, or be able to execute.

Advisory 2021-002: Active exploitation of vulnerable

We have evidence that the vulnerability got exploited very quickly after the release of the initial advisory issued by Microsoft on March 2nd 2021, probably even within just a few hours. At the moment, we are still receiving and dispatching information about the vulnerabilities and possible compromised organizations in Switzerland CVE-2021-26855 is a server-side request forgery (SSRF) vulnerability in Exchange which allowed the attacker to send arbitrary HTTP requests and authenticate as the Exchange server. CVE-2021-26857 is an insecure deserialization vulnerability in the Unified Messaging service. Insecure deserialization is where untrusted user-controllable data is. address the four vulnerabilities in Microsoft Exchange Servers and associated IOCs. • Alert (AA21-062A): Mitigate Microsoft Exchange Server Vulnerabilities TECHNICAL DETAILS On March 2, 2021, Microsoft released security updates for several zero-day exploits (CVE 2021-26855, CVE-2021-26857, CVE-2021-26858, and CVE-2021-27065) However, on March 2, 2021, they noticed that threat actors started scanning for vulnerable Exchange email servers in less than five minutes after Microsoft's disclosure of the three ProxyLogin.

Microsoft Exchange Server Vulnerabilitie

Original release date: March 04, 2021 CISA has updated the Alert on the Microsoft Exchange server vulnerabilities with additional detailed mitigations. CISA encourages administrators to review the updated Alert and the Microsoft Security Update and apply the necessary updates as soon as possible or disconnect vulnerable Exchange servers from the internet until the necessary patch is made available On March 2, Microsoft released patches to tackle four critical vulnerabilities in Microsoft Exchange Server software. At the time, the company said that the bugs were being actively exploited in. Background: On March 2, 2021, Microsoft reported that four vulnerabilities were discovered in the Microsoft Exchange servers from 2013 and later (including 2016, 2019). The vulnerable servers appear to host Web versions of Microsoft's email program Outlook on their own machines instead of cloud providers

Detection and Response to Exploitation of Microsoft

  1. On March 2, 2021, Microsoft released emergency security updates for Microsoft Exchange Server that patched seven vulnerabilities, among them four were zero-days that were being exploited in the wild by multiple threat actors.. ESET's telemetry revealed that several cyber-espionage groups of Chinese origin like LuckyMouse, Tick and Calypso are exploiting at least CVE-2021-26855 to achieve pre.
  2. On 2 March 2021, Microsoft released several security updates for Microsoft Exchange Server 2013, 2016 and 2019 to address vulnerabilities (CVE-2021-26855, CVE-2021-26857, CVE-2021-26858, CVE-2021-27065) that have been used in limited targeted attacks. These vulnerabilities can allow an attacker to gain unauthorised access to mailboxes and.
  3. On March 2, 2021, Microsoft announced several vulnerabilities that have been used to attack on-premises versions of Microsoft Exchange Server. The state-sponsored threat actor, called Hafnium, used Zero-Day vulnerabilities to access on-premises Exchange servers to gain access to email accounts
  4. Microsoft Exchange Server Vulnerability Advisory | March 2021. Zero-day vulnerabilities announced by Microsoft may impact your clients. Here's what you need to know. Last updated March 17, 2021. On March 2nd 2021 Microsoft issued an alert on its blog concerning attack activity from a China-based threat actor it calls Hafnium
  5. On March 2, 2021 Microsoft released a number of critical security updates for Exchange. These are not just a number of new Security Updates, but these are Security Updates for a zero-day vulnerability and as such rated as 'critical'. An additional problem here is that the exploit has already been detected in the wild, so all internet facing.
  6. new vulnerabilities are different from the ones disclosed and fixed in March 2021, therefore the and then send specially crafted requests to the vulnerable Exchange Server. The vulnerabilities CVE-2021-28482 and CVE-2021-28483 are post-authentication vulnerabil-ities in Microsoft Exchange Server

Microsoft Exchange hack, explained - CNB

Microsoft Exchange Server Attack Timeline: Discoveries and

Released: April 2021 Exchange Server Security Updates

Out of Band Critical Exchange Security Updates–March 2021

HAFNIUM targeting Exchange Servers with 0-day exploits

  1. Zero Day Vulnerabilities Discovered in all Versions of Microsoft Exchange Server. March 3, 2021 jaapwesselius 4 Comments. Microsoft has detected multiple 0-day exploits being used to attack on-premises versions of Exchange Server in limited and targeted attacks. In the campaigns observed, threat actors used this vulnerability to access on.
  2. The vulnerabilities allow remote code execution (RCE) and Exchange server takeover or information siphoning. Microsoft released security updates for on-premise variants of Exchange Server (2010 to 2019) on March 2 to address these vulnerabilities (see Exchange server 0-day exploits are actively exploited)
  3. March 2, 2021 - Exchange Server Out of Band Key Info. Is there anything I need to do before installing this update? March 2021 Exchange Server Security Updates for older Cumulative Updates •Exchange Server 2010 (RU 31 for Service Pack 3 -this is a Defense-in-Depth update) •Exchange Server 2013 (CU 23) •Exchange Server 2016 (CU 19, CU 18
  4. The vulnerabilities being targeted, which Microsoft has since issued patches for, are CVE-2021-26855, CVE-2021-26857, CVE-2021-26858 and CVE-2021-27065. These vulnerabilities were reported on March 2, 2021 and affect Microsoft Exchange Server versions 2013, 2016 an
  5. On March 10, 2021, ESET reported on a range of threat activity groups, largely Chinese state sponsored, exploiting a pre-authentication remote code execution (RCE) vulnerability chain that allows an attacker initial access to internet-facing Microsoft Exchange servers: CVE-2021-26855 [ProxyLogon] CVE-2021-26857. CVE-2021-26858
  6. On 2 March, Microsoft released security updates for Exchange Server to protect users against vulnerabilities in on-premises versions of the software, with the China-based state-sponsored actor Hafnium flagged as the primary group behind exploits targeting the flaws. The vulnerabilities — CVE-2021-26855, CVE-2021-26857, CVE-2021-26858 and CVE.
  7. Microsoft Exchange Server cropped up in the news a lot throughout 2021. It's earned the lion's spot on Cisco Talos' quarterly report. Exchange woes comprised 35% of all incidents Cisco Talos.

At Least 30,000 U.S. Organizations Newly Hacked Via Holes ..

  1. als who see the sector as a soft target
  2. Exchange Vulnerability 2021. Published on March 9, 2021 13:21 +0100 by GovCERT.ch Last updated on March 9, 2021 13:21 +0100 Introduction. In the past days, there was a lot of press coverage about several critical zero day vulnerabilities in Microsoft Exchange Server that are being tracked under the following CVEs
  3. g an On-Demand Scan of Exchange servers after applying the Microsoft Patch appropriate for the affected OS. Included ODS targeted scan information. March 12, 2021 Updated DAT coverage. March 5, 2021 Added Extra.DAT attachment
  4. Since the beginning of March 2021, the group of Exchange email server operators has been shaken up badly. Microsoft had to announce in early March 2021 that there were four vulnerabilities in One Premises Exchange server systems. The vulnerabilities were closed by an update as of March 2, 2021
  5. CVE-2021-27065 - Exchange Server is vulnerable to post-authentication file rewriting, allowing an authenticated attacker to arbitrarily write files to any location. Exchange Online not affected. Organisations should be aware that only the listed Exchange Server versions, either physically or virtually hosted, are vulnerable
  6. The court-ordered removal of the web shells, or scripts used by hackers for persistent access, is one of the most aggressive actions taken yet by U.S. government officials or corporate executives to combat the Exchange Server vulnerabilities since Microsoft announced on March 2 that suspected Chinese spies were exploiting them
  7. The four vulnerabilities in question impact Exchange Server 2013, 2016 and 2019, and have been assigned CVEs 2021-28480, -28481, -28482 and -28483. Their common vulnerability scoring system (CVSS.

Threat Assessment: Active Exploitation of Four Zero-Day

Tuesday, March 16, 2021: Microsoft's Latest Guidance: Microsoft offers this guidance to responders who are investigating and remediating on-premises Exchange Server vulnerabilities. The guidance describes how the hack works, how to determine if you're vulnerable, how to mitigate the threat, whether you've been compromised, remediation steps and next-steps for protection Cyberthreat update from Acronis CPOCs: Week of March 29, 2021. Submitted by Eric Swotinsky on 2 Apr 2021. Here at Acronis, we're always monitoring for dangers to your data, deploying updates to handle newly-discovered vulnerabilities, and issuing alerts and recommendations to help you stay protected. Our global network of Acronis Cyber. Our work continues, but we are seeing strong momentum for on-premises Exchange Server updates: • 92% of worldwide Exchange IPs are now patched or mitigated. • 43% improvement worldwide in the.

This alert is an updated version of the NCSC alert from 3 March 2021 and contains additional information on installing updates and detection. On 2 March 2021 Microsoft made public that sophisticated actors had attacked a number of Exchange servers. In response to this they released multiple security updates for affected servers MICROSOFT EXCHANGE VULNERABILITIES March 2021 3 INTRODUCTION On 2nd March 2021, Microsoft released security updates for Microsoft Exchange server suite. Active exploitation has been observed ever since on premises running MS Exchange installations. Although the initial focus of malicious attacks was observed mainly in the US

On March 2, 2021, Microsoft finally became aware of the exploits and issued necessary security patches. By that point, it was too late. About 60,000 organizations were comprised through the overlooked Exchange Server vulnerabilities, and tens of thousands are still unaware that they're currently exposed through these Microsoft Server flaws On March 2, 2021, Microsoft alerted users of their on-premise Exchange Server 2010, 2013, 2016, and 2019 of four previously unknown Zero-Day vulnerabilities. On March 3, 2021, CISA issued Emergency Directive 21-02 in response to the disclosed Zero-Day vulnerabilities Description of the security update for Microsoft Exchange Server 2019, 2016, and 2013: March 2, 2021 (KB5000871) Setup notice and best practices. .net framework. Latest build of exchange CU need .net framework 4.8. It needs to be installed first. In case you need to prepare schema/AD on DC directly, .net framework 4.8 is needed on DC as well Analyzing attacks taking advantage of the Exchange Server vulnerabilities. Microsoft continues to monitor and investigate attacks exploiting the recent on-premises Exchange Server vulnerabilities. These attacks are now performed by multiple threat actors ranging from financially motivated cybercriminals to state-sponsored groups

Multiple targeted attacks exploiting Microsoft Exchange Server Remote Code Execution Vulnerability were detected early March 2021 by the Microsoft Security Response Center (MSRC) that investigates all reports of security vulnerabilities affecting Microsoft products and services. These vulnerabilities, which only affect Exchange Servers installed on a local server, allow access to e-mail. On March 2, Microsoft warned that the four zero-day vulnerabilities-- now tracked as CVE-2021-26855, CVE-2021-26857, CVE-2021-26858, and CVE-2021-27065 -- were being exploited by threat actors in. Security Advisory 2021-013 Zero-Day Vulnerabilities in Microsoft Exchange March 16, 2021 — v1.2 TLP:WHITE History: • 03/03/2021 — v1.0 - Initial publication • 11/03/2021 — v1.1 - Update concerning recommended investigation • 16/03/2021 — v1.2 - Update concerning Microsoft mitigation tool Summary Several Zero Day vulnerabilities affecting Microsoft Exchange servers were. When Microsoft issued emergency patches on March 2, the company said the vulnerabilities were being exploited in limited and targeted attacks by a state-backed hacking group in China known as Hafnium

News of the four vulnerabilities emerged on March 2, when Microsoft issued patches for CVE-2021-26855, CVE-2021-26857, CVE-2021-26858, and CVE-2021-27065. These flaws affect Microsoft Exchange. On Tuesday 2nd March 2021, Microsoft released patches for multiple different on-premises Microsoft Exchange Server zero-day vulnerabilities that are being exploited by a nation-state affiliated group. The vulnerabilities exist in on-premises Exchange Servers 2010, 2013, 2016, and 2019 Update March 10, 2021: A new section describes how to respond with mitigation controls if patches cannot be applied, as recommended by Microsoft. This section details the Qualys Policy Compliance control ids for each vulnerability. Update March 8, 2021: Qualys has released an additional QID: 50108 which remotely detects instances of Exchange Server vulnerable to ProxyLogon vulnerability CVE. Patch now! Exchange servers attacked by Hafnium zero-days. Microsoft has released updates to deal with 4 zero-day vulnerabilities being used in an attack chain aimed at users of Exchange Server. Microsoft has detected multiple zero-day exploits being used to attack on-premises versions of Microsoft Exchange Server in limited and targeted attacks

The threat. On March 2, 2021 Microsoft reported (opens a new window) that it has observed targeted attacks that take advantage of four zero-day vulnerabilities in Microsoft Exchange Server to gain full access to all email on the victim's system. The attacks do not affect Exchange Online. Technical information about the attacks is available in this report (opens a new window) by the. Microsoft Safety Scanner Tool. March 6 Update: Microsoft has updated the latest version of the Microsoft Safety Scanner (MSERT.EXE) to detect and remediate the latest threats known to abuse the Exchange vulnerabilities disclosed on March 2, 2021. Administrators can use this tool for servers to scan for known indicators from adversaries. Microsoft Exchange server vulnerabilities. On the 5 th of January 2021 there was an exploit reported on the Microsoft Exchange server and on the 6 th January 2021 the first breach was observed. But nobody really knew anything about it. The attacker was detected by a group on the 5 th of January and also by another group on the 6 th of January and then Microsoft acknowledged the problem.

On March 2, 2021 Microsoft detected multiple zero-day exploits being used to attack on-premises versions of Microsoft Exchange Server.. Over the next few days, over 30,000 organisations in the US. CVE-2021-26855 - Server-side request forgery (SSRF) vulnerability, also known as 'ProxyLogon', allowing threat actors to send arbitrary HTTP requests and authenticate as the Exchange server . CVE-2021-26857 - Insecure deserialization vulnerability, allowing untrusted data to be processed, in the Exchange Unified Messaging Service leading to code execution with SYSTEM privileges

CRITICAL REMOTE CODE EXECUTION FLAWS IN MICROSOFT EXCHANGE ARE BEING ACTIVELY EXPLOITED. March 5, 2021. The SonicWall Capture Labs Threat Research team has received reports that threat actors are actively exploiting the following Microsoft Exchange vulnerabilities: CVE-2021-26855. CVE-2021-26857. CVE-2021-26858 Microsoft has released an updated script that scans Exchange log files for indicators of compromise (IOCs) associated with the vulnerabilities disclosed on March 2, 2021.. National CSIRT-CY is aware of widespread domestic and international exploitation of these vulnerabilities and strongly recommends organizations run the Test-ProxyLogon.ps1 script as soon as possible to help determine whether.

CVE-2021-26855, -26857, -27065, and -26858 - Microsoft Exchange Server Remote Code Execution Vulnerabilities discussed above, which were patched on March 2. The first three of these are rated critical and the last is rated important. Other critical vulnerabilities patche These Exchange Server attacks initially were attributed to a Hafnium nation-state group back when Microsoft released patches for the vulnerabilities on March 2, with espionage being the presumed. More Ransomware Gangs Targeting Vulnerable Exchange Servers. The Black Kingdom/Pydomer ransomware operators have joined the ranks of threat actors targeting the Exchange Server vulnerabilities that Microsoft disclosed in early March. The zero-day bugs, four in total, had been targeted in live attacks well before patches were released for them. Exchange servers under siege from at least 10 APT groups. On 2021-03-02, Microsoft released out-of-band patches for Microsoft Exchange Server 2013, 2016 and 2019. These security updates fixed a. CVE-2021-26855 is a server-side request forgery (SSRF) vulnerability in Exchange that allowed the attacker to send arbitrary HTTP requests and authenticate as the Exchange server. CVE-2021-26857.

A: These vulnerabilities are used as part of an attack chain. The initial attack requires the ability to make an untrusted connection to Exchange server port 443. This can be protected against by restricting untrusted connections, or by setting up a VPN to separate the Exchange server from external access A new tool developed by Microsoft Corp. to contain damage from a massive hack of its email server U.S. Sees Progress in Closing Microsoft Exchange Vulnerabilities March 22, 2021,. During the first week of March 2021, Microsoft and security researchers disclosed four vulnerabilities in Microsoft Exchange that were under active attack. Vulnerabilities are flaws in software that can enable attacks. In this case, these vulnerabilities make it possible for attackers to completely take over the Exchange server

Introduction. On March 2 nd, 2021 at ~6pm GMT Microsoft released an out of band update to all version of exchange from 2010 through to 2019.This was in response to a range of vulnerabilities which had been abused (a 0-day) by a threat actor (coined by MS as HAFNIUM) By Linn Foster Freedman on March 4, 2021. Posted in Cybersecurity. The vulnerabilities being exploited were CVE-2021-26855, CVE-2021-26857, CVE-2021-26858, and CVE-2021-27065. The vulnerabilities detected by Microsoft affect Microsoft Exchange Server 2013, 2016,. — ESET research (@ESETresearch) March 2, 2021. Microsoft also addressed three unrelated Exchange Server vulnerabilities. In addition to the four zero-day vulnerabilities, Microsoft also patched three unrelated remote code execution (RCE) vulnerabilities in Microsoft Exchange Server that were disclosed to them by security researcher Steven Seeley

Microsoft Exchange Server Vulnerabilities Mitigations - updated March 6, 2021 - Microsoft Security Response Center. Microsoft has released alternative mitigation techniques for Exchange Server customers who are not able to immediately apply updates that address vulnerabilities disclosed on March 2, 2021 They earn $200,000 and 20 Master of Pwn points. Today Microsoft released security updates for Exchange 2013, Exchange 2016 and Exchange 2019 that addresses security vulnerability found recently. The following Remote Code Execution vulnerabilities are fixed with these updates: CVE-2021-28480. CVE-2021-28481

Attacks exploiting Microsoft Exchange Server flaws: What

Ransomware criminals riding higher on recent Exchange Server vulnerabilities. By CybersecAsia editors | Monday, April 5, 2021, 4:32 PM Asia/Singapore. WannaCry has resurfaced again for some reason, amid a 57% global surge in the already-high ransomware attack levels: report. Following the recent disclosure of vulnerabilities affecting Microsoft. Threat actors targeting the Exchange Server vulnerabilities that Microsoft revealed in early March have now included the Black Kingdom/Pydomer ransomware. Despite the availability of additional mitigations, the zero-day vulnerabilities had been targeted in live attacks long before patches were released on March 2, with exponentially more adversaries picking them up over the past three weeks

CVE-2021-26858 and CVE-2021-27065, two post-authentication arbitrary file write vulnerabilities in Exchange that allowed the group to write a file to any path on the server (after authenticating. More on Exchange Server vulnerabilities, Cyber Security Today, March 12, 2021 - More on Exchange Server vulnerabilities, criminal groups blocked from using secure messaging service and warning about sex toys . Howard Solomon @howarditwc Published: March 12th, 2021 New nation-state cyberattacks. Today, we're sharing information about a state-sponsored threat actor identified by the Microsoft Threat Intelligence Center (MSTIC) that we are calling Hafnium. Hafnium operates from China, and this is the first time we're discussing its activity. It is a highly skilled and sophisticated actor March 15, 2021 Zachary Comeau Leave a Comment. Microsoft is reportedly looking into whether its security partners played a role in helping hackers carry out attacks exploiting the Exchange Server vulnerabilities, according to the Wall Street Journal. In a March 12 article, the Journal reported that the IT behemoth is questioning how threat.

These attacks began back in January and February of 2021 when various hackers discovered and exploited zero-day vulnerabilities in Microsoft Exchange Server software. The hackers took advantage of these vulnerabilities to set up backdoors and gain persistent access to these servers, right up until they were caught in March of 2021 The zero-days are present in Microsoft Exchange Server 2013, 2016, and 2019. The four vulnerabilities are: CVE-2021-26855, a server-side request forgery (SSRF) vulnerability that allowed the. On March 2, 2020, Microsoft released the patches via MSRC: Volexity published their findings: Microsoft published further information about nation-state attacks, and identified HAFNIUM specifically as the primary threat actor exploiting these vulnerabilities Microsoft Corp. issued a warning today that a new Chinese state-sponsored hacking group is targeting on-premises versions of Microsoft Exchange Server using a number of recently identified and now pa Exploit code for two Microsoft Exchange Server vulnerabilities under attack was published to GitHub earlier today. The Microsoft-owned platform quickly took down the proof-of-concept (PoC). The.

Exchange Server Security Update KB5001779 (April 13, 2021) [ German ]As expected, Microsoft has released security updates for Exchange Server 2013, Exchange Server 2016 and Exchange Server 2019 on April 13, 2021 (Patchday). These are intended to close vulnerabilities found that were reported by security companies In March 2021, Microsoft kicked off the patch cycle early after releasing an advisory regarding the mass exploitation of four zero-days vulnerabilities by a Chinese Hacking group, HAFNIUM, on the on-premises versions of the Microsoft Exchange Server. In the following days of the attack, Trend Micro reported that at least 30,000 organizations.

Microsoft issues emergency patches for 4 exploited 0-daysExchange server 0-day exploits are actively exploitedSophos advises Coys on proactive measures regardingCybersecurity and Geopolitical video podcast – March 2021
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