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.
According to the CVSS metric, the attack vector is local (AV:L). What does that mean for this vulnerability?
An attacker could trigger this vulnerability remotely by having valid permissions on the Azure Resource Manager (ARM) API to access the Azure Relay. In the worst case scenario, an attacker could locally trigger this vulnerability by running code as a lower-privileged user on the same computer that Azure Arc is running on (AV:L). When multiple attack vectors can be used, we assign a score based on the scenario with the higher risk.
Security updates
1.60.03293.2680 — https://learn.microsoft.com/en-us/azure/azure-arc/servers/agent-release-notes
Vulnerabilities 1
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High 7.8
Azure Connected Machine Agent Elevation of Privilege Vulnerability
Stack-based buffer overflow in Azure Connected Machine Agent allows an authorized attacker to elevate privileges locally.
Revision history
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#1
Information published.
References
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CVE-2026-21224 Azure Connected Machine Agent Elevation of Privilege Vulnerability - HTML
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21224
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Microsoft Exploitability Index
https://www.microsoft.com/en-us/msrc/exploitability-index?rtc=1
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Microsoft Support Lifecycle
https://support.microsoft.com/lifecycle
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Common Vulnerability Scoring System
https://www.first.org/cvss