CVE-2026-26117: CWE-288: Authentication Bypass Using an Alternate Path or Channel in Microsoft Arc Enabled Servers - Azure Connected Machine Agent
Authentication bypass using an alternate path or channel in Azure Windows Virtual Machine Agent allows an authorized attacker to elevate privileges locally.
AI Analysis
Technical Summary
CVE-2026-26117 is a CWE-288 authentication bypass vulnerability affecting Microsoft Arc Enabled Servers' Azure Connected Machine Agent version 1.0.0. It enables an authorized local attacker to elevate privileges by using an alternate path or channel to bypass authentication controls. The vulnerability has a CVSS v3.1 base score of 7.8, indicating high severity with high impact on confidentiality, integrity, and availability. The affected product is a cloud service, and Microsoft has provided an official fix to address this issue.
Potential Impact
An authorized attacker with local access can bypass authentication mechanisms and elevate their privileges, potentially gaining higher-level access than intended. This can lead to full compromise of the affected system's confidentiality, integrity, and availability.
Mitigation Recommendations
Microsoft has released an official fix for this vulnerability. Since this is a cloud-hosted service, Microsoft manages the remediation server-side. Users should verify that their Azure Connected Machine Agent is updated to the fixed version as per Microsoft's advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26117.
CVE-2026-26117: CWE-288: Authentication Bypass Using an Alternate Path or Channel in Microsoft Arc Enabled Servers - Azure Connected Machine Agent
Description
Authentication bypass using an alternate path or channel in Azure Windows Virtual Machine Agent allows an authorized attacker to elevate privileges locally.
CVSS v3.1
Score 7.8high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-26117 is a CWE-288 authentication bypass vulnerability affecting Microsoft Arc Enabled Servers' Azure Connected Machine Agent version 1.0.0. It enables an authorized local attacker to elevate privileges by using an alternate path or channel to bypass authentication controls. The vulnerability has a CVSS v3.1 base score of 7.8, indicating high severity with high impact on confidentiality, integrity, and availability. The affected product is a cloud service, and Microsoft has provided an official fix to address this issue.
Potential Impact
An authorized attacker with local access can bypass authentication mechanisms and elevate their privileges, potentially gaining higher-level access than intended. This can lead to full compromise of the affected system's confidentiality, integrity, and availability.
Mitigation Recommendations
Microsoft has released an official fix for this vulnerability. Since this is a cloud-hosted service, Microsoft manages the remediation server-side. Users should verify that their Azure Connected Machine Agent is updated to the fixed version as per Microsoft's advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26117.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-02-11T15:52:13.911Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Is Cloud Service
- true
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26117","vendor":"Microsoft"}]
Threat ID: 69b05631ea502d3aa87d6b2c
Added to database: 03/10/2026, 17:34:41 UTC
Last enriched: 06/19/2026, 20:30:55 UTC
Last updated: 07/31/2026, 19:22:58 UTC
Views: 228
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