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

Api.Msrc.Microsoft • March 10, 2026

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

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This article is one source in a clustered incident — the cluster page carries the summary, timeline and every other outlet covering it.

Multiple Elevation of Privilege Vulnerabilities in Azure Arc and Linux VMs Three critical elevation of privilege vulnerabilities have been identified in Azure services, affecting both Windows and Linux virtual machines. CVE-2026-26141 and CVE-2026-26117 involve improper authentication and authentication bypass in Azure Arc-enabled Windows VMs, while CVE-2026-23665 pertains to a heap-based buffer overflow in Azure Linux VMs, all allowing authorized attackers to elevate privileges locally. 3 sources 71

Extracted Entities

Attack Types (1)

Zero-day Exploit

CVEs (1)

MITRE ATT&CK (1)

T1068 - Exploitation for Privilege Escalation

Platforms (2)

Azure Arc Windows