CVE-2026-26141: Hybrid Worker Extension (Arc‑enabled Windows VMs) Elevation of Privilege Vulnerability

Overview

Severity

High (CVSS 7.8)

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

Category

Elevation of Privilege

Exploit Status

Not Exploited

Exploitation Likelihood

Unlikely

Patch Tuesday

2026-Mar

Released

2026-03-10

EPSS Score

0.04% (percentile: 12.1%)

Description

Improper authentication in Azure Arc allows an authorized attacker to elevate privileges locally.

FAQ

What privileges could be gained by an attacker who successfully exploited this vulnerability? An attacker who successfully exploited this vulnerability could gain ELEVATED privileges.

Affected Products (1)

Azure

• Azure Automation Hybrid Worker Windows Extension

Security Updates (1)

• Release Notes

Acknowledgments

Michal Kamensky with Microsoft

Revision History

• 2026-03-10: Information published.