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TI-2026-17371 Aliases CVE-2026-21517GHSA-px7f-389h-299v

Windows App for Mac Installer Elevation of Privilege Vulnerability

Priority LOW 33CWE-59Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
High
Impact type
Privilege escalation
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from Microsoft.

Summary

Improper link resolution before file access ('link following') in Windows App for Mac allows an authorized attacker to elevate privileges locally.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00374 31st percentileScored 2026-11-07
Fix Fixed Windows App for Mac (Microsoft): 11.3.2

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

VendorProductAffected versionsFixed inStatusSource
MicrosoftWindows App for Mac11.0.0 to before 11.3.211.3.2Patch availableCNA
  • Windows App for Mac VendorMicrosoft Affected 11.0.0 to before 11.3.2 Fixed in 11.3.2 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:microsoft:windows_app:*:*:*:*:*:macos:*:*before 11.3.2VulnerableMicrosoft
  • cpe:2.3:a:microsoft:windows_app:*:*:*:*:*:macos:*:* Versions before 11.3.2 Vulnerable ·Microsoft

Remediation

  • Fix · CNA Windows App for Mac (Microsoft) Fixed in 11.3.2

Vendor assessments

Microsoft

Microsoft's page for this CVE →

Impact
Elevation of Privilege
Exploited
No
Publicly disclosed
No
Exploitability
Exploitation Less Likely
ProductStatusPlan or fix
Windows App for MacFixed 11.3.2 · Security Update

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-21517
  2. 2026-10-03 Alias added: GHSA-px7f-389h-299v

References

Patch 1

  • TI-2026-42292 Microsoft High Performance Computing (HPC) Pack Remote Code Execution Vulnerability CVSS 3.1CRITICAL 9.8
  • TI-2025-19580 Remote Desktop Client Remote Code Execution Vulnerability CVSS 3.1HIGH 8.8
  • TI-2026-31167 Remote Desktop Client Remote Code Execution Vulnerability CVSS 3.1HIGH 8.8
  • TI-2025-21342 Remote Desktop Client Remote Code Execution Vulnerability CVSS 3.1HIGH 8.8
  • TI-2026-42300 Microsoft High Performance Computing (HPC) Pack Elevation of Privilege Vulnerability CVSS 3.1HIGH 8.8
  • TI-2026-34866 Remote Desktop Client Remote Code Execution Vulnerability CVSS 3.1HIGH 8.8
See all 20 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences