MSRC-CVE-2026-26117 — Arc Enabled Servers - Azure Connected Machine Agent Elevation of Privilege Vulnerability

Summary

Impact: Elevation of Privilege. Microsoft rating: Important. Not known to be exploited — Exploitation Unlikely. 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
1.61 — https://learn.microsoft.com/en-us/azure/azure-arc/servers/agent-release-notes#version-161---february-2026

Vulnerabilities 1

High 7.8

CVE-2026-26117

Arc Enabled Servers - Azure Connected Machine Agent Elevation of Privilege Vulnerability

Authentication bypass using an alternate path or channel in Azure Windows Virtual Machine Agent allows an authorized attacker to elevate privileges locally.

Microsoft Arc Enabled Servers - Azure Connected Machine Agent

Mar 10, 2026

Revision history

2026-03-10 #1
Information published.

References

CVE-2026-26117 Arc Enabled Servers - Azure Connected Machine Agent Elevation of Privilege Vulnerability - HTML
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26117
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