CVE-2026-72953: CWE-122: Heap-based Buffer Overflow in Microsoft Windows 10 Version 21H2
Description
CVE-2026-72953 is a heap-based buffer overflow vulnerability in the Windows USB Driver affecting Windows 10 Version 21H2 and related builds. It allows an authorized local attacker to elevate privileges. The vulnerability has a high severity with a CVSS score of 7.8. An official fix is available from Microsoft.
CVSS v3.1
Score 7.8high
Affected software
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 2022
Microsoft
Windows Server 2025
Microsoft
Windows Server 2025 (Server Core installation)
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability is a heap-based buffer overflow in the Windows USB Driver that can be exploited by an authorized local attacker to elevate privileges on affected Windows 10 versions. The flaw exists in multiple Windows 10 builds starting from 10.0.19044.0 up to but not including patched builds such as 10.0.19044.7725 and others. The CVSS 3.1 vector indicates local attack vector, low complexity, required privileges, no user interaction, and high impact on confidentiality, integrity, and availability. Microsoft has published an official fix for this vulnerability.
Potential Impact
Successful exploitation allows an authorized local attacker to elevate privileges, potentially gaining higher system rights. The impact is high on confidentiality, integrity, and availability of the affected 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 detailed in the Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-72953.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-08-10T18:36:42.029Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-72953","vendor":"Microsoft"}]
Threat ID: 6aa04548acd9273b49fa9d15
Added to database: 09/08/2026, 17:26:32 UTC
Last enriched: 10/16/2026, 21:46:39 UTC
Last updated: 10/23/2026, 15:10:14 UTC
Views: 36
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