CVE-2026-69599: CWE-416: Use After Free in Microsoft Windows 11 version 23H2
Description
CVE-2026-69599 is a use-after-free vulnerability in Microsoft Windows 11 version 23H2 Remote Desktop Services. It allows an authorized attacker with low privileges to execute code remotely over a network. The vulnerability has a high severity score of 7.5 and impacts confidentiality, integrity, and availability. An official fix is available from Microsoft.
CVSS v3.1
Score 7.5high
Affected software
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 2025
Microsoft
Windows Server 2025 (Server Core installation)
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-69599) involves a use-after-free condition in Windows Remote Desktop Services on Windows 11 version 23H2. An authorized attacker with low privileges can exploit this flaw remotely to execute arbitrary code. The CVSS v3.1 score is 7.5, reflecting network attack vector, high impact on confidentiality, integrity, and availability, and requiring low privileges but high attack complexity. Microsoft has published an official fix for affected versions.
Potential Impact
Successful exploitation allows remote code execution with elevated impact on system confidentiality, integrity, and availability. The attacker must be authorized and have low privileges but can execute code remotely over the network, potentially leading to full system compromise.
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-2026-69599 to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-08-03T21:18:49.124Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69599","vendor":"Microsoft"}]
Threat ID: 6aa04515acd9273b49fa969a
Added to database: 09/08/2026, 17:25:41 UTC
Last enriched: 10/16/2026, 21:23:50 UTC
Last updated: 10/23/2026, 15:10:14 UTC
Views: 32
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