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CVE-2026-69503 is a stack-based buffer overflow vulnerability in the Windows USB Driver affecting multiple builds of Windows 10 Version 1809 and later. This flaw allows an authorized attacker to elevate privileges over a network. The vulnerability has a high severity rating with a CVSS score of 8. An official fix is available from Microsoft.

This vulnerability, identified as CVE-2026-69503 and categorized under CWE-121 (stack-based buffer overflow), exists in the Windows USB Driver component of Microsoft Windows 10 Version 1809 and several subsequent builds. It enables an authorized attacker to perform privilege escalation remotely over a network. The vulnerability has been assigned a CVSS v3.1 base score of 8.0, indicating high severity, with impact on confidentiality, integrity, and availability. Microsoft has released an official fix to address this issue.

Detailed information about CVE-2026-69503: CWE-121: Stack-based Buffer Overflow in Microsoft Windows 10 Version 1809 affecting Microsoft Windows 10 Version 1809

CVE-2026-69503: CWE-121: Stack-based Buffer Overflow in Microsoft Windows 10 Version 1809 - Live Threat Intelligence - Threat Radar | OffSeq.com

CVE-2026-69503: CWE-121: Stack-based Buffer Overflow in Microsoft Windows 10 Version 1809

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