Main Vulnerability Database Vulnerabilities #VU154349

Use-after-free in Microsoft .NET Framework - CVE-2026-105725

Published: October 13, 2026

Vulnerability identifier: #VU154349

CSH Severity: Low

CVSS v4: 7.3 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-105725

CWE-ID: CWE-416

Exploitation vector: Local access

Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a local user to escalate privileges to SYSTEM.

The vulnerability exists due to use-after-free in Windows Security App when a local race condition is triggered. A local user can win the race condition to escalate privileges to SYSTEM.

Affected software

Microsoft .NET Framework

How to mitigate CVE-2026-105725

Install security update from vendor's website.

Microsoft .NET Framework - update to 1000.27840.1000.0

External References

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2026-105725
https://support.microsoft.com/en-us/windows/stay-protected-with-the-windows-security-app-2ae0363d-0ada-c064-8b56-6a39afb6a963

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