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PatchSiren cyber security CVE debrief

CVE-2026-26141 Microsoft CVE debrief

PatchSiren debrief for CVE-2026-26141 based on the supplied source corpus. The Hybrid Worker Extension Elevation of Privilege Vulnerability in Azure Arc-enabled Windows VMs allows an authorized attacker to elevate privileges locally due to improper authentication. Defenders responsible for Azure Automation Hybrid Worker Windows Extension deployments should assess exposure and prioritize patching to prevent potential elevation of privilege attacks. The CVE record and source item provide details on the vulnerability, with a CVSS score of 7.8 and HIGH severity. There are no known ransomware campaign uses. The vulnerability affects Azure Automation Hybrid Worker Windows Extension, and

Vendor
Microsoft
Product
Azure Automation Hybrid Worker Windows Extension
CVSS
HIGH 7.8
CISA KEV
Not listed in stored evidence
Original CVE published
2026-03-10
Original CVE updated
2026-10-15
Advisory published
2026-03-10
Advisory updated
2026-10-15

Who should care

Defenders responsible for Azure Automation Hybrid Worker Windows Extension deployments should assess exposure and prioritize patching to prevent potential elevation of privilege attacks.

Why it matters

CVE-2026-26141 is a HIGH-severity elevation of privilege vulnerability in Azure Arc-enabled Windows VMs, allowing authorized attackers to elevate privileges locally. Defenders should prioritize verifying exposure and applying patches to prevent potential attacks.

  • Verify and apply patches to Azure Automation Hybrid Worker Windows Extension versions prior to 1.3.74
  • Monitor system logs for potential exploitation attempts
  • Review and update affected system configurations

Technical summary

The Hybrid Worker Extension Elevation of Privilege Vulnerability in Azure Arc-enabled Windows VMs allows an authorized attacker to elevate privileges locally due to improper authentication. The vulnerability affects Azure Automation Hybrid Worker Windows Extension versions prior to 1.3.74. Defenders should prioritize verifying exposure of affected systems and applying vendor-provided patches. The CVE record and source item provide details on the vulnerability, with a CVSS score of 7.8 and HIGH severity.

Defensive priority

Defenders should prioritize verifying exposure of Azure Automation Hybrid Worker Windows Extension versions prior to 1.3.74 and applying vendor-provided patches.

Recommended defensive actions

  • Verify Azure Automation Hybrid Worker Windows Extension version and apply patches if necessary
  • Review and update affected system configurations
  • Monitor system logs for potential exploitation attempts

Evidence notes

The CVE record and source item provide details on the Hybrid Worker Extension Elevation of Privilege Vulnerability in Azure Arc-enabled Windows VMs, with a CVSS score of 7.8 and HIGH severity.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-26141 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-26141

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-26141 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-26141

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.