CVE-2026-69503: CWE-121: Stack-based Buffer Overflow in Microsoft Windows 10 Version 1809
Description
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.
CVSS v3.1
8.0high
Affected software
Microsoft
Windows 10 Version 1809
Microsoft
Windows 10 Version 21H2
Microsoft
Windows 10 Version 22H2
Microsoft
Windows 11 version 23H2
Microsoft
Windows 11 Version 23H2
Microsoft
Windows 11 Version 24H2
Microsoft
Windows 11 Version 25H2
Microsoft
Windows 11 version 26H1
Microsoft
Windows Server 2019
Microsoft
Windows Server 2019 (Server Core installation)
Microsoft
Windows Server 2022
Microsoft
Windows Server 2025
Microsoft
Windows Server 2025 (Server Core installation)
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
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.
Potential Impact
Successful exploitation of this vulnerability allows an authorized attacker to elevate privileges on the affected system remotely over a network. This can lead to full compromise of the affected Windows 10 system, impacting confidentiality, integrity, and availability of the system.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security updates provided by Microsoft for the affected Windows 10 versions as soon as possible to remediate this vulnerability. Refer to the Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69503 for detailed update instructions.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 08/03/2026
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [object Object]
Threat ID: 6aa04503acd9273b49fa8153
Added to database: 09/08/2026, 17:25:23 UTC
Last enriched: 10/16/2026, 21:17:41 UTC
Last updated: 10/24/2026, 08:45:12 UTC
Views: 33
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