What is CVE-2026-26117?

CVE-2026-26117 is a security advisory published by Microsoft Security Response Center (MSRC) with High severity. Arc Enabled Servers - Azure Connected Machine Agent Elevation of Privilege Vulnerability

Which CVE IDs does CVE-2026-26117 cover?

CVE-2026-26117 covers the following CVE IDs: CVE-2026-26117. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2026-26117?

CVE-2026-26117 has a CVSS v3 base score of 7.8, published by Microsoft Security Response Center (MSRC).

Which products are affected by CVE-2026-26117?

CVE-2026-26117 affects 1 product, including: Arc Enabled Servers - Azure Connected Machine Agent.

CVE-2026-26117HighCVSS 7.8

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

Vendor

Microsoft Security Response Center (MSRC)

Published

May 31, 2026

Last Modified

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🔗 CVE IDs covered (1)

CVE-2026-26117 →

📋 Description

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

🎯 Affected products1

Arc Enabled Servers - Azure Connected Machine Agent

✅ Remediation

KBRelease Notes (Security Update - Windows) — fixed build 1.61 KBRelease Notes (Security Update - Linux) — fixed build 1.61

🔗 References (4)

advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26117
patchhttps://gbl.his.arc.azure.com/azcmagent/1.61/AzureConnectedMachineAgent.msi
referencehttps://learn.microsoft.com/en-us/azure/azure-arc/servers/agent-release-notes#version-161---february-2026
patchhttps://learn.microsoft.com/en-us/azure/azure-arc/servers/manage-agent#install-a-specific-version-of-the-agent