CVE-2026-88119: CWE-416: Use After Free in Microsoft Windows Server 2012
Description
CVE-2026-88119 is a high-severity use-after-free vulnerability in the Windows DHCP Server component affecting multiple versions of Microsoft Windows Server 2012 and related builds. This vulnerability allows an unauthorized attacker to execute code remotely over a network. An official fix is available from Microsoft.
CVSS v3.1
Score 8.1high
Affected software
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
CVE-2026-88119 is a use-after-free vulnerability (CWE-416) in the Windows DHCP Server that enables remote code execution by an unauthenticated attacker over the network. The flaw affects several Windows Server versions including 6.2.9200.0 through 6.2.9200.26433, 6.3.9600.0 through 6.3.9600.23469, and multiple Windows 10 build ranges up to but not including specific patched builds. The vulnerability has a CVSS 3.1 base score of 8.1, indicating high severity with network attack vector, high impact on confidentiality, integrity, and availability, and requires no privileges or user interaction. Microsoft has released official patches to address this issue.
Potential Impact
Successful exploitation allows an attacker to execute arbitrary code remotely on affected Windows Server systems via the DHCP Server service, potentially leading to full system compromise. The vulnerability impacts confidentiality, integrity, and availability of the affected systems.
Mitigation Recommendations
Microsoft has released official security updates that address this vulnerability. Administrators should apply these patches promptly to affected systems. No additional mitigation is required beyond applying the official fix.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-09-09T21:51:51.955Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-88119","vendor":"Microsoft"}]
Threat ID: 6ace855b2cdf04f6569ff50f
Added to database: 10/13/2026, 19:24:11 UTC
Last enriched: 10/14/2026, 01:48:46 UTC
Last updated: 10/14/2026, 01:48:46 UTC
Views: 2
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