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TI-2026-73379 Aliases CVE-2026-105725GHSA-7rc7-xq5x-rcpw

Use after free in Windows Security App allows privilege escalation

Priority LOW 33CWE-416Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-416 and the CVSS impact.

Summary

Use after free in Windows Security App lets an authorized local attacker escalate privileges. The attacker needs low privileges on the system, and the flaw is classified as CWE-416.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

Use after free in Windows Security App allows an authorized attacker to elevate privileges locally.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00279 20th percentileScored 2026-11-07
Fix Fixed Windows Security App (Microsoft): 1000.27840.1000.0

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 Security App1000.0.0.0 to before 1000.27840.1000.01000.27840.1000.0Patch availableCNA
  • Windows Security App VendorMicrosoft Affected 1000.0.0.0 to before 1000.27840.1000.0 Fixed in 1000.27840.1000.0 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:microsoft:windows_security_app:*:*:*:*:*:*:*:*before 1000.27840.0.1000VulnerableMicrosoft
  • cpe:2.3:a:microsoft:windows_security_app:*:*:*:*:*:*:*:* Versions before 1000.27840.0.1000 Vulnerable ·Microsoft

Remediation

Microsoft Windows Security App versions from 1000.0.0.0 before 1000.27840.1000.0 are affected, and the fix is version 1000.27840.1000.0.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

  • Fix · CNA Windows Security App (Microsoft) Fixed in 1000.27840.1000.0

Timeline

  1. 2026-10-13 Threatist record created from CVE-2026-105725
  2. 2026-10-13 CISA SSVC decision points changed
  3. 2026-10-13 Priority changed: MEDIUM → LOW
  4. 2026-10-13 Alias added: GHSA-7rc7-xq5x-rcpw

References

Patch 1

  • TI-2025-30349 Windows Security App Spoofing Vulnerability CVSS 3.1MEDIUM 5.5
  • TI-2025-33670 Windows Security App Spoofing Vulnerability CVSS 3.1MEDIUM 5.5

Sources

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