Microsoft Windows 11 24H2/11 25H2/11 26H1/Server 2025 User Interface Core path traversal

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Microsoft Windows 11 24H2/11 25H2/11 26H1/Server 2025. Affected by this vulnerability is an unknown functionality of the component User Interface Core. The manipulation leads to path traversal. This vulnerability is referenced as CVE-2026-50454. The attack can only be performed from a local environment. No exploit is available.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Microsoft Windows 11 24H2/11 25H2/11 26H1/Server 2025. This issue affects an unknown functionality of the component User Interface Core. The manipulation with an unknown input leads to a path traversal vulnerability. Using CWE to declare the problem leads to CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Relative path traversal in Windows User Interface Core allows an authorized attacker to elevate privileges locally.

The advisory is shared at msrc.microsoft.com. The identification of this vulnerability is CVE-2026-50454 since 06/04/2026. The exploitation is known to be easy. An attack has to be approached locally. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 07/14/2026). MITRE ATT&CK project uses the attack technique T1006 for this issue.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• Operating System

Vendor

• Microsoft

Name

• Windows

Version

• 11 24H2
• 11 25H2
• 11 26H1
• Server 2025

License

• commercial

Website

• Vendor: https://www.microsoft.com/
• Product: https://www.microsoft.com/en-us/windows

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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