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CVE-2026-83873 is a high-severity vulnerability in Microsoft Windows 10 Version 1607 involving a relative path traversal flaw in the Windows Shell. This vulnerability allows an authorized local attacker to elevate privileges. It affects multiple specific builds of Windows 10 and earlier versions as listed. An official fix is available from Microsoft.

CVE-2026-83873 is a relative path traversal vulnerability (CWE-23) in the Windows Shell component of Microsoft Windows 10 Version 1607 and related builds. This flaw enables an authorized local attacker to perform privilege escalation by exploiting improper handling of relative paths. The vulnerability has a CVSS 3.1 base score of 7.8, indicating high severity with high impact on confidentiality, integrity, and availability. Multiple affected Windows 10 builds are identified with specific version ranges. Microsoft has published an official fix for this vulnerability.

CVE-2026-83873 is a high-severity vulnerability in Microsoft Windows 10 Version 1607 involving a relative path traversal flaw in the Windows Shell. This vulnerability allows an authorized local attacker to elevate privileges. It affects multiple specific builds of Windows 10 and earlier versions as 

CVE-2026-83873: CWE-23: Relative Path Traversal in Microsoft Windows 10 Version 1607

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