CVE-2026-69910: CWE-121: Stack-based Buffer Overflow in Microsoft Windows 10 Version 1607
Description
CVE-2026-69910 is a critical stack-based buffer overflow vulnerability in Windows Hyper-V affecting multiple builds of Windows 10 Version 1607 and later. It allows an unauthorized attacker to execute code remotely over a network without user interaction or privileges. The vulnerability has a CVSS score of 9.8, indicating high impact on confidentiality, integrity, and availability. Microsoft has released official patches to address this issue.
CVSS v3.1
Score 9.8critical
Affected software
Microsoft
Windows 10 Version 1607
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 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, identified as CVE-2026-69910 and classified under CWE-121 (stack-based buffer overflow), affects Windows Hyper-V on Windows 10 Version 1607 and subsequent builds. An attacker can exploit this flaw remotely to execute arbitrary code without requiring privileges or user interaction. The vulnerability is present in multiple Windows 10 builds, specifically those versions starting from 10.0.14393.0 up to but not including various patch levels (e.g., <10.0.14393.9512, <10.0.17763.9245, etc.). Microsoft has published an official fix for this vulnerability.
Potential Impact
Successful exploitation allows remote, unauthorized attackers to execute arbitrary code on affected systems, potentially leading to full system compromise including confidentiality, integrity, and availability impacts. The vulnerability does not require user interaction or privileges, increasing its severity.
Mitigation Recommendations
Microsoft has released official patches to remediate this vulnerability. It is strongly recommended to apply the security updates provided by Microsoft as detailed in their advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69910. No additional mitigations are specified or required beyond applying the official fix.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-08-03T22:56:39.492Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69910","vendor":"Microsoft"}]
Threat ID: 6aa04537acd9273b49fa9ade
Added to database: 09/08/2026, 17:26:15 UTC
Last enriched: 10/16/2026, 21:39:05 UTC
Last updated: 10/23/2026, 15:10:14 UTC
Views: 113
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