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CVE-2026-83927 is a high-severity vulnerability in Microsoft Windows 10 Version 21H2 involving improper link resolution before file access in the Windows Registry. This flaw allows an authorized local attacker to elevate privileges. Multiple specific Windows 10 builds are affected. An official fix is available from Microsoft.

This vulnerability, identified as CWE-59 (Improper Link Resolution Before File Access), exists in the Windows Registry component of Microsoft Windows 10 Version 21H2. It allows an authorized local attacker to elevate privileges by exploiting improper handling of symbolic links or similar link types before accessing files. The CVSS 3.1 base score is 7.8, reflecting high impact on confidentiality, integrity, and availability. The affected versions include multiple Windows 10 builds from 10.0.19044.0 up to but excluding various patch builds (e.g., <10.0.19044.7807). Microsoft has issued an official fix for this vulnerability.

CVE-2026-83927 is a high-severity vulnerability in Microsoft Windows 10 Version 21H2 involving improper link resolution before file access in the Windows Registry. This flaw allows an authorized local attacker to elevate privileges. Multiple specific Windows 10 builds are affected. An official fix i

CVE-2026-83927: CWE-59: Improper Link Resolution Before File Access ('Link Following') in Microsoft Windows 10 Version 21H2

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