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

What privileges could an attacker gain with successful exploitation?
An attacker who successfully exploited the vulnerability could elevate their privileges as ‘NT AUTHORITY\SYSTEM’ user and perform arbitrary code execution.

What actions do customers need to take to protect themselves from this vulnerability?
Customers should update their Azure Connected Machine Agent to the latest version. For more information, see What's new with Azure Connected Machine agent.

According to the CVSS metric, the attack vector is local (AV:L) and privileges required is low (PR:L). What does this mean in the context of this elevation of privilege vulnerability?
An attacker needs to be authorized as a standard user on the localhost to execute this attack. They could then elevate their privileges to perform unauthorized operations.

According to the CVSS metric, the attack complexity is high (AC:H). What does that mean for this vulnerability?
Successful exploitation of this vulnerability requires the attacker to invest in some measurable amount of effort in preparation or execution against the vulnerable component before a successful attack can be expected.

Security updates
1.57 — https://learn.microsoft.com/en-us/azure/azure-arc/servers/agent-release-notes#version-157---october-2025