Hybrid Worker Extension (Arc‑enabled Windows VMs) Elevation of Privilege Vulnerability
Priority LOW 36CWE-287Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Privilege escalation
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from Microsoft.
Summary
Improper authentication in Azure Arc allows an authorized attacker to elevate privileges locally.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00338 27th percentileScored 2026-11-07
Fix Fixed Azure Automation Hybrid Worker Windows Extension (Microsoft): 1.3.74
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Microsoft | Azure Automation Hybrid Worker Windows Extension | 1.0.0 to before 1.3.74 | 1.3.74 | Patch available | CNA |
- Azure Automation Hybrid Worker Windows Extension VendorMicrosoft Affected 1.0.0 to before 1.3.74 Fixed in 1.3.74 Patch available CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:microsoft:azure_automation_hybrid_worker_windows_extension:*:*:*:*:*:*:*:* | 1.0.0 to before 1.3.74 | Vulnerable | Microsoft |
- cpe:2.3:a:microsoft:azure_automation_hybrid_worker_windows_extension:*:*:*:*:*:*:*:* Versions 1.0.0 to before 1.3.74 Vulnerable ·Microsoft
Remediation
- Fix · CNA Azure Automation Hybrid Worker Windows Extension (Microsoft) Fixed in 1.3.74
Vendor assessments
Microsoft
Microsoft's page for this CVE →
- Impact
- Elevation of Privilege
- Exploited
- No
- Publicly disclosed
- No
- Exploitability
- Exploitation Unlikely
| Product | Status | Plan or fix |
|---|---|---|
| Azure Automation Hybrid Worker Windows Extension | Fixed | 1.3.74 · Security Update |
Timeline
- 2026-10-02 Threatist record created from CVE-2026-26141
- 2026-10-03 Alias added: GHSA-rfgw-m548-mw46
References
Sources
- CVE-2026-26141 · CVE Program
- CVE-2026-26141 · NVD
- FIRST EPSS
- GHSA-rfgw-m548-mw46 · GitHub Advisory Database · CC BY 4.0
- CVE-2026-26141 · Microsoft Security Update Guide
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences