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Cover image for CVE-2026-26117 | Arc Enabled Servers - Azure Connected Machine Agent Elevation of Privilege Vulnerability
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Aakash Rahsi

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CVE-2026-26117 | Arc Enabled Servers - Azure Connected Machine Agent Elevation of Privilege Vulnerability

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CVE-2026-26117 — Azure Connected Machine Agent — Local privilege flow across trust boundary

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CVE-2026-26117 | Arc Enabled Servers - Azure Connected Machine Agent Elevation of Privilege Vulnerability

CVE-2026-26117 Arc Enabled Servers Azure Connected Machine Agent EoP insight into execution context, trust boundaries, and access flow.

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  • Authentication bypass can influence privilege within local execution context
  • Affects Arc Enabled Servers using Azure Connected Machine Agent below 1.61
  • Patch now and review local privilege and access controls

Executive Summary

Severity: CVSS 7.8 | Internal Rating: High

Business Impact: Expanded local access, workload control exposure, compliance impact

Exploitability: Possible — requires authorized local access path

Action Window: Patch now — hybrid management agents sit near sensitive trust boundaries

What is the vulnerability

  • Type: Authentication Bypass / Elevation of Privilege
  • Where: Azure Windows Virtual Machine Agent
  • Trust Boundary: Local identity and execution boundary

This reflects how execution context and alternate access paths can align across a sensitive trust boundary.

Affected Scope

Area Details
Product Arc Enabled Servers - Azure Connected Machine Agent
Deployment Hybrid
Versions 1.0.0 to < 1.61
Preconditions Authorized local access, reachable agent surface

Attack Narrative

An actor reaches a valid local management surface.

The system processes an alternate path within its intended execution context.

That interaction can align with privileged trust assumptions.

Outcome: expanded local capability within managed workload boundaries.

Detection Guidance

  • Review agent and admin logs
  • Monitor unusual local privilege changes
  • Watch for unexpected agent behavior
  • Track irregular management actions

Mitigation & Remediation

Primary: Apply Microsoft updates

Compensating Controls:

  • Tighten local admin rights
  • Restrict agent access paths
  • Review hybrid workload permissions

Long-Term:

  • Audit trust boundaries in management agents
  • Strengthen least-privilege design

Risk Rating

Factor Score
Likelihood 3
Impact 4
Detectability 3
Overall High

Notes: Local authenticated context shapes exposure.

Stakeholder Impact

  • CISO Office
  • IT Ops
  • Hybrid Security Teams

FAQ

  • Are we affected? → If Azure Connected Machine Agent is below 1.61
  • What changed? → Alternate-path trust handling in local execution context
  • What are we doing? → Updating agents and reviewing privilege paths

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