CVE-2026-69890: CWE-416: Use After Free in Microsoft Windows 10 Version 1809

This vulnerability, identified as CWE-416 (Use After Free), exists in the Windows Virtual Trusted Platform Module on Windows 10 Version 1809 and several other specific builds. An authorized attacker with local access and high privileges can exploit this flaw to elevate their privileges, potentially gaining greater control over the affected system. The vulnerability affects multiple Windows 10 versions, specifically those versions starting from 10.0.17763.0 up to but not including 10.0.17763.9245, and similarly for other specified build ranges. Microsoft has published an official fix for this vulnerability, and no known exploits are reported in the wild at this time.

Successful exploitation allows an authorized local attacker with high privileges to elevate their privileges further, potentially compromising system confidentiality, integrity, and availability. The CVSS vector indicates that the attack requires local access, high attack complexity, and high privileges, but no user interaction. The scope is changed, and the impact on confidentiality, integrity, and availability is high.

An official fix from Microsoft is available and should be applied promptly to affected systems. Refer to the Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69890 for detailed patching instructions. Since the vulnerability requires local high privileges, applying the patch will prevent privilege escalation via this flaw.