High MSRC-CVE-2026-65813 1 CVE

Microsoft Exchange Server Elevation of Privilege Vulnerability

Published Aug 11, 2026 · Updated Aug 28, 2026 · Revision 2

Vendor: Microsoft

Summary

Impact: Elevation of Privilege. Microsoft rating: Important. Not known to be exploited — Exploitation Less Likely. Customer action: Required.

Details

Security updates
15.02.2562.046 — https://support.microsoft.com/help/5121573
15.01.2507.072 — https://support.microsoft.com/help/5121576
15.02.1748.049 — https://support.microsoft.com/help/5121574
15.02.1544.044 — https://support.microsoft.com/help/5121575

Vulnerabilities 1

Medium 6.5

CVE-2026-65813

Microsoft Exchange Server Elevation of Privilege Vulnerability

Server-side request forgery (ssrf) in Microsoft Exchange Server allows an authorized attacker to elevate privileges over a network.

Microsoft Microsoft Exchange Server 2016 Cumulative Update 23 Microsoft Exchange Server Subscription Edition RTM Microsoft Exchange Server 2019 Cumulative Update 14

Aug 11, 2026

Revision history

2026-08-28 #2
Updated an acknowledgement. This is an informational change only.
2026-08-11 #1
Information published.

References

CVE-2026-65813 Microsoft Exchange Server Elevation of Privilege Vulnerability - HTML
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-65813
Microsoft Exploitability Index
https://www.microsoft.com/en-us/msrc/exploitability-index?rtc=1
Microsoft Support Lifecycle
https://support.microsoft.com/lifecycle
Common Vulnerability Scoring System
https://www.first.org/cvss