Reported by 9 outlets

Timeline

1. original reporting

   Microsoft Exchange Server security updates close multiple vulnerabilities including elevation of privilege flaw CVE-2026-96940

   borncity.com · 11d ago · October 2nd, 2026

   There are several security updates for Microsoft Exchange Server that close multiple vulnerabilities at once, including the elevation of privilege flaw CVE-2026-96940. The updates are dated 2 October 2026 and are out-of-band, ahead of the regular October Patch Tuesday.

   via Mastodon https://borncity.com/blog/2026/10/02/exchange-server-sicherheits-updates-vom-2-10-2026-schliessen-cve-2026-96940/

2. update from www.valtersit.com

   CVE-2026-96940 - Privilege Escalation in Microsoft Exchange Server from weak authorization. CVSS 8.8. Currently unpatched. Restrict network

   www.valtersit.com · 10d ago · October 3rd, 2026

   CVE-2026-96940 - Privilege Escalation in Microsoft Exchange Server from weak authorization. CVSS 8.8. Currently unpatched. Restrict network

   via Mastodon https://www.valtersit.com/cve/CVE-2026-96940/

3. update from gbhackers.com

   Microsoft Releases Emergency Exchange Server Update to Fix CVE-2026-96940

   gbhackers.com · 9d ago · October 5th, 2026

   Microsoft has released a revised security update package for on-premises Exchange Server, dated September 2026, which includes a fix for CVE-2026-96940. This V2 release applies to Exchange Server Subscription Edition, Exchange Server 2019, and Exchange Server 2016. Customers using Exchange Online are already protected and do not need this update. The revised update was published […] The post Microsoft Releases Emergency Exchange Server Update to Fix CVE-2026-96940 appeared first on GBHackers Security | #1 Globally Trusted Cyber Security News Platform .

4. update from thehackernews.com

   🚨 Microsoft Exchange Server vulnerability requires attention Microsoft has released an out-of-band security update for a high-severity Excha

   thehackernews.com · 8d ago · October 5th, 2026

   🚨 Microsoft Exchange Server vulnerability requires attention Microsoft has released an out-of-band security update for a high-severity Excha

   via Mastodon https://thehackernews.com/2026/10/microsoft-exchange-flaw-lets.html

5. mentioned by thehackernews.com

   🤖 Microsoft released out-of-band updates for CVE-2026-96940 (CVSS 8.8) in Exchange Server: weak authorization lets an authenticated attacker

   thehackernews.com · 8d ago · October 5th, 2026

6. update from malware.news

   Microsoft security advisory (AV26-1001)

   malware.news · 8d ago · October 5th, 2026

   Serial Number: AV26-1001 Date: October 5, 2026 As of October 2, 2026, Microsoft is affected by a vulnerability in the following products: Microsoft Exchange Server 2016 Cumulative Update 23 Prior to 15.01.2507.075 Microsoft Exchange Server 2019 Cumulative Update 14 Prior to 15.02.1544.048 Microsoft Exchange Server 2019 Cumulative Update 15 Prior to 15.02.1748.053 Microsoft Exchange Server Subscription Edition RTM Prior to 15.02.2562.053 The Cyber Centre encourages users and administrators to review the provided web links and apply any necessary updates as they become available.

7. update from thecybersecguru.com

   CVE-2026-96940 is an Exchange Server privilege escalation flaw rated CVSS 8.8. An authenticated attacker can potentially bypass authorizatio

   thecybersecguru.com · 7d ago · October 6th, 2026

   An authenticated attacker can potentially bypass authorizatio

   via Mastodon https://thecybersecguru.com/exploits/cve-2026-96940-microsoft-exchange-vulnerability/

8. update from cyber.netsecops.io

   📰 Microsoft Patches High-Severity Exchange Privilege Escalation Flaw Microsoft issues out-of-band patch for high-severity Exchange Server fl

   cyber.netsecops.io · 7d ago · October 6th, 2026

   📰 Microsoft Patches High-Severity Exchange Privilege Escalation Flaw Microsoft issues out-of-band patch for high-severity Exchange Server fl

   via Mastodon https://cyber.netsecops.io/articles/microsoft-patches-high-severity-exchange-server-privilege-escalation-flaw-cve-2026-96940/?utm_source=mastodon&utm_medium=social&utm_campaign=daily

9. update from socprime.com

   CVE-2026-96940: Microsoft Exchange Vulnerability Allows Unauthorized Mailbox Access

   socprime.com · 7d ago · October 6th, 2026

   Microsoft has released an out-of-band security update addressing CVE-2026-96940, a high-severity vulnerability in Microsoft Exchange Server that could allow authenticated attackers to access other users’ mailboxes and read sensitive emails and attachments. The flaw carries a CVSS score of 8.8 and affects multiple on-premises Exchange Server versions. The vulnerability comes amid growing security concerns surrounding enterprise email infrastructure, which remains a high-value target for cybercriminals seeking sensitive information and unauthorized access. Although Microsoft has not observed active exploitation, the company has assessed exploitation as more likely, emphasizing the importance of timely patching. To strengthen defenses against emerging threats, organizations can leverage SOC Prime’s AI-Native Detection Intelligence Platform to accelerate detection engineering, investigate suspicious activity, and improve visibility across their security infrastructure. Security teams can use Uncoder AI to create and refine detection logic, transform threat intelligence into hunting queries, and translate detection content across 40+ SIEM, EDR, and Data Lake formats. Contact Sales CVE-2026-96940 Analysis According to Microsoft’s security advisory , the vulnerability stems from weak authorization mechanisms in Exchange Server. The flaw allows an authenticated attacker to elevate privileges over a network and potentially access mailboxes belonging to other users within the same orga

10. mentioned by www.it-connect.fr

    📢 [VULN] Microsoft Exchange: flaw CVE-2026-96940 allows reading other users mailboxes. Microsoft has just published

    www.it-connect.fr · 6d ago · October 7th, 2026