Main Vulnerability Database Vulnerabilities #VU138150

Use-after-free in Microsoft Windows and Windows Server - CVE-2026-58537

Published: July 17, 2026

Vulnerability identifier: #VU138150

CSH Severity: Low

CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-58537

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.

The vulnerability exists due to use-after-free in Microsoft NAT Helper Components (ipnathlp.dll) when handling local operations. A local user can trigger the flaw to escalate privileges.

Successful exploitation could result in SYSTEM privileges.

Affected software

Microsoft Windows
Windows Server

How to mitigate CVE-2026-58537

Install security update from vendor's website.

Microsoft Windows - addressed in versions 11 24H2 10.0.26100.8875, 11 26H1 10.0.28000.2525
Windows Server - addressed in versions 2012 R2 6.3.9600.23291, 2025 10.0.26100.33158

External References

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2026-58537

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