Remote Code Execution Vulnerability in NFS ONCRPC XDR Driver by Microsoft
CVE-2026-78445

9.8CRITICAL

Key Information:

Vendor

Microsoft
Status
Windows Server 2012
Windows Server 2012 (server Core Installation)
Windows Server 2012 R2
Windows Server 2012 R2 (server Core Installation)
Vendor
CVE Published:
8 September 2026

What is CVE-2026-78445?

A vulnerability exists in the Windows Services for NFS ONCRPC XDR Driver, allowing unauthorized attackers to exploit a use-after-free condition. This flaw could enable malicious actors to execute arbitrary code remotely, posing significant security risks to affected systems. Timely application of patches and updates is crucial to mitigate potential exploitation.

Affected Version(s)

Windows Server 2012 (Server Core installation) x64-based Systems 6.2.9200.0 < 6.2.9200.26349

Windows Server 2012 R2 (Server Core installation) x64-based Systems 6.3.9600.0 < 6.3.9600.23397

Windows Server 2012 R2 x64-based Systems 6.3.9600.0 < 6.3.9600.23397

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE...
vendor-advisorypatch

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.