CVE-2026-70065: CWE-401: Missing Release of Memory after Effective Lifetime in Microsoft Windows 10 Version 1607
Description
CVE-2026-70065 is a high-severity vulnerability in Microsoft Windows 10 Version 1607 and related versions involving a missing release of memory after its effective lifetime in the Windows DHCP Server component. This flaw allows an unauthorized attacker to cause a denial of service (DoS) over a network by exhausting system resources. The vulnerability has a CVSS score of 7.5 and affects multiple Windows 10 builds and earlier Windows versions as specified. 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 2012
Microsoft
Windows Server 2012 (Server Core installation)
Microsoft
Windows Server 2012 R2
Microsoft
Windows Server 2012 R2 (Server Core installation)
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 (CWE-401) in Windows DHCP Server arises from failure to release memory after its effective lifetime, leading to resource exhaustion. An attacker can exploit this to deny service on affected systems by causing the DHCP Server to consume excessive memory. The issue affects Windows 10 Version 1607 and other specified versions prior to certain patch levels. Microsoft has published an official fix addressing this memory management flaw.
Potential Impact
Successful exploitation results in denial of service (DoS) by exhausting memory resources in the Windows DHCP Server, potentially disrupting network services. There is no impact on confidentiality or integrity reported. The vulnerability can be exploited remotely without privileges or user interaction.
Mitigation Recommendations
An official fix is available from Microsoft and should be applied to affected systems. Refer to the Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70065 for patch details and update instructions.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-08-03T23:17:43.744Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70065","vendor":"Microsoft"}]
Threat ID: 6aa04537acd9273b49fa9aec
Added to database: 09/08/2026, 17:26:15 UTC
Last enriched: 10/16/2026, 21:39:41 UTC
Last updated: 10/23/2026, 15:10:14 UTC
Views: 33
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