CVE-2026-78445: CWE-416: Use After Free in Microsoft Windows Server 2012
Description
Use after free in Windows Services for NFS ONCRPC XDR Driver allows an unauthorized attacker to execute code over a network.
CVSS v3.1
Score 9.8critical
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
This vulnerability (CVE-2026-78445) involves a use-after-free condition in the Windows Services for NFS ONCRPC XDR Driver component of Microsoft Windows Server 2012 and other affected Windows versions. Exploitation enables remote code execution by an unauthenticated attacker over the network. The CVSS 3.1 base score is 9.8, indicating critical severity with high impact on confidentiality, integrity, and availability. Microsoft has published an official security update to address this issue.
Potential Impact
Successful exploitation allows an attacker to execute arbitrary code remotely without authentication, potentially leading to full system compromise. The vulnerability impacts confidentiality, integrity, and availability of affected systems.
Mitigation Recommendations
An official security update from Microsoft is available and should be applied to affected systems to remediate this vulnerability. Refer to the Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-78445 for update details and deployment guidance.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-08-24T16:21:50.286Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-78445","vendor":"Microsoft"}]
Threat ID: 6aa0455eacd9273b49faa0f7
Added to database: 09/08/2026, 17:26:54 UTC
Last enriched: 10/14/2026, 21:59:59 UTC
Last updated: 10/23/2026, 15:10:15 UTC
Views: 57
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