CVE-2026-69781: CWE-401: Missing Release of Memory after Effective Lifetime in Microsoft Windows 11 Version 24H2
Description
CVE-2026-69781 is a vulnerability in the Windows DHCP Client component of Microsoft Windows 11 Version 24H2. It involves a missing release of memory after its effective lifetime, which can be exploited by an unauthorized attacker on an adjacent network to cause a denial of service. The vulnerability has a medium severity with a CVSS score of 6.5. An official fix is available from Microsoft.
CVSS v3.1
Score 6.5medium
Affected software
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, identified as CWE-401 (Missing Release of Memory after Effective Lifetime), affects the Windows DHCP Client in Windows 11 Version 24H2. It allows an attacker on an adjacent network to exploit improper memory management, leading to denial of service conditions. The flaw is present in specific builds of Windows 11 Version 24H2, as indicated by the affected version ranges. Microsoft has published an official fix for this issue.
Potential Impact
The impact of this vulnerability is a denial of service (DoS) condition caused by memory not being released properly after its effective lifetime. This can be triggered by an unauthorized attacker on an adjacent network, potentially disrupting network connectivity or system stability. There is no impact on confidentiality or integrity reported.
Mitigation Recommendations
An official fix is available from Microsoft for this vulnerability. Users and administrators should apply the provided security updates as soon as possible to remediate the issue. Refer to the Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69781 for the latest patch information and update instructions.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-08-03T22:46:09.553Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69781","vendor":"Microsoft"}]
Threat ID: 6aa04529acd9273b49fa9934
Added to database: 09/08/2026, 17:26:01 UTC
Last enriched: 10/16/2026, 21:33:20 UTC
Last updated: 10/23/2026, 15:10:14 UTC
Views: 31
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