Summary
Impact: Elevation of Privilege. Microsoft rating: Important. Not known to be exploited — Exploitation More Likely. Customer action: Required.
Details
What privileges could be gained by an attacker who successfully exploited the vulnerability?
An attacker would be able to delete any system files.
What privileges could be gained by an attacker who successfully exploited this vulnerability?
An attacker who successfully exploited this vulnerability could gain SYSTEM privileges.
Security updates
10.0.26100.33158 — https://support.microsoft.com/help/5099536
10.0.26200.8875 — https://support.microsoft.com/help/5101650
10.0.28000.2525 — https://support.microsoft.com/help/5101649
Vulnerabilities 1
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High 7.8
Windows User Interface Core Elevation of Privilege Vulnerability
Relative path traversal in Windows User Interface Core allows an authorized attacker to elevate privileges locally.
Revision history
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#1
Information published.
References
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CVE-2026-50454 Windows User Interface Core Elevation of Privilege Vulnerability - HTML
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50454
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Microsoft Exploitability Index
https://www.microsoft.com/en-us/msrc/exploitability-index?rtc=1
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Microsoft Support Lifecycle
https://support.microsoft.com/lifecycle
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Common Vulnerability Scoring System
https://www.first.org/cvss