SB2026031075 - Privilege escalation in Microsoft Hybrid Worker Extension (Arc‑enabled Windows VMs)
Published: March 10, 2026
Security Bulletin ID
SB2026031075
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Improper Authentication (CVE-ID: CVE-2026-26141)
The vulnerability allows a local user to bypass authentication process.
The vulnerability exists due to an error when processing authentication requests in Hybrid Worker Extension (Arc‑enabled Windows VMs). A local user can bypass authentication process and gain elevated privileges on the system.
Remediation
Install update from vendor's website.