CVE-2026-96248: CWE-121: Stack-based Buffer Overflow in Microsoft Windows 10 Version 1607
Description
CVE-2026-96248 is a high-severity stack-based buffer overflow vulnerability in the Windows Host Guardian Service affecting Windows 10 Version 1607 and later builds up to specific patched versions. This vulnerability allows an unauthorized attacker to cause a denial of service over a network. An official fix is available from Microsoft.
CVSS v3.1
Score 7.5high
Affected software
Microsoft
Windows 10 Version 1607
Microsoft
Windows 10 Version 1809
Microsoft
Windows Server 2016
Microsoft
Windows Server 2016 (Server Core installation)
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 is a stack-based buffer overflow (CWE-121) in the Windows Host Guardian Service on Windows 10 Version 1607 and certain later builds. It enables an unauthenticated attacker to remotely cause a denial of service condition. The CVSS 3.1 base score is 7.5, reflecting network attack vector, low attack complexity, no privileges or user interaction required, and impact limited to availability. Microsoft has published an official fix for this vulnerability.
Potential Impact
An attacker can exploit this vulnerability remotely without authentication to cause a denial of service, impacting system availability. There is no impact on confidentiality or integrity according to the CVSS vector. No known exploits are currently in the wild.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security updates provided by Microsoft for Windows 10 Version 1607 and affected builds as detailed in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-96248.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-09-22T19:05:22.814Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-96248","vendor":"Microsoft"}]
Threat ID: 6ace85752cdf04f656a00460
Added to database: 10/13/2026, 19:24:37 UTC
Last enriched: 10/14/2026, 00:34:11 UTC
Last updated: 10/14/2026, 00:34:11 UTC
Views: 2
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