MSRC-CVE-2026-118151 — Microsoft Exchange Server Elevation of Privilege Vulnerability

Summary

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

Details

What privileges could be gained by an attacker who successfully exploited this vulnerability?
An attacker who successfully exploited this vulnerability could gain SYSTEM privileges.

Security updates
15.02.2562.057 — https://support.microsoft.com/en-us/servicing/exchange/server/update/2026/5133453

Vulnerabilities 1

High 7.2

CVE-2026-118151

Microsoft Exchange Server Elevation of Privilege Vulnerability

External control of file name or path in Microsoft Exchange Server allows an authorized attacker to elevate privileges over a network.

Microsoft Microsoft Exchange Server Subscription Edition RTM

Nov 10, 2026

Revision history

2026-11-10 #1
Information published.

References

CVE-2026-118151 Microsoft Exchange Server Elevation of Privilege Vulnerability - HTML
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-118151
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