CVE-2026-69397: CWE-416: Use After Free in Microsoft Windows 10 Version 1809
Description
CVE-2026-69397 is a use-after-free vulnerability in OpenSSH for Microsoft Windows 10 Version 1809 and later versions. This flaw allows an unauthorized attacker to execute code remotely over a network. The vulnerability affects multiple Windows 10 builds prior to specific patched versions. Microsoft has released official fixes to address this issue. The vulnerability has a high severity rating with a CVSS score of 7.5. No known exploits are reported in the wild at this time.
CVSS v3.1
Score 7.5high
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 (CVE-2026-69397) is a use-after-free condition in OpenSSH for Windows 10, which can be exploited by an unauthorized attacker to execute arbitrary code remotely. The affected versions include multiple Windows 10 builds starting from 10.0.17763.0 up to but not including various patched builds (e.g., <10.0.17763.9245, <10.0.19044.7725, etc.). The CVSS 3.1 base score is 7.5, indicating high severity, with network attack vector, high complexity, no privileges required, user interaction required, and impacts on confidentiality, integrity, and availability. Microsoft has issued official fixes for this vulnerability.
Potential Impact
Successful exploitation allows remote code execution by an unauthorized attacker, potentially leading to full system compromise. The vulnerability impacts confidentiality, integrity, and availability of affected systems. No known active exploits have been reported.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security updates provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69397 to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-08-03T20:57:58.962Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69397","vendor":"Microsoft"}]
Threat ID: 6aa044f2acd9273b49fa7f8e
Added to database: 09/08/2026, 17:25:06 UTC
Last enriched: 10/16/2026, 21:09:28 UTC
Last updated: 10/23/2026, 13:15:20 UTC
Views: 34
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