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CVE-2026-69595

Windows Services for NFS ONCRPC XDR Driver Remote Code Execution Vulnerability

Published: Sep 8, 2026Updated: Sep 9, 2026 Sources: CVE List NVDCWE-416
9.8CRITICAL
NVD MITRE
EPSS Score
1.1%
Top 37.2%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available
Self-Check
OpenVAS

Description

Use after free in Windows Services for NFS ONCRPC XDR Driver allows an unauthorized attacker to execute code over a network.

In plain language

AI Act now

CVE-2026-69595 is a Windows Services for NFS problem that can let an attacker run code remotely; if you use Windows Server with NFS enabled, this is serious and you should update.

Executive summary

CVE-2026-69595 is a remote code execution issue in the Windows Services for NFS ONCRPC XDR driver caused by a memory safety weakness (use-after-free), allowing a network attacker to trigger it without authentication.

If affected, business impact
Full server takeoverRansomware and data theft riskOperations disruptionLoss of confidentiality

What to do now

  1. Check whether you run Windows Services for NFS (NFS) on these servers: Windows Server 2012, 2012 R2, 2016, 2019, 2022, or 2025.
  2. For each affected server, update to the fixed version that matches your OS exactly:
    • Windows Server 2012 → 6.2.9200.26349
    • Windows Server 2012 R2 → 6.3.9600.23397
    • Windows Server 2016 → 10.0.14393.9512
    • Windows Server 2019 → 10.0.17763.9245
    • Windows Server 2022 → 10.0.20348.5622
    • Windows Server 2025 → 10.0.26100.33438
  3. If you cannot patch immediately, remove or disable NFS exposure (especially any network-accessible NFS/ONCRPC services) until updates are applied.
  4. After patching, confirm the update is installed on each server and monitor for unusual network traffic to NFS-related services.
Patch / advisory Usually a quick update

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
Open in CVSS calculator →

Weaknesses

CWE-416

Affected Products

Microsoft
commercial·US
Windows Server 2012 (Server Core installation)On-premOS
Operating Systems / windows
Windows Server 2012 R2 (Server Core installation)On-premOS
Operating Systems / windows
Windows Server 2016 (Server Core installation)On-premOS
Operating Systems / windows
Windows Server 2019 (Server Core installation)On-premOS
Operating Systems / windows
Windows Server 2022On-premOS
Operating Systems / windows
Windows Server 2025 (Server Core installation)On-premOS
Operating Systems / windows
and 5 more affected products View all →

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.
Is your org exposed to CVE-2026-69595?We can run the check for you — a free external exposure review, no install. Check my exposure

Attack Graph

Products CVE Techniques Tactics

Click technique nodes for MITRE ATT&CK details · drag to pan · Ctrl/⌘ + scroll to zoom, or go fullscreen.

MITRE ATT&CK

2 techniques
Initial Access
Privilege Escalation
View detailed technique mapping

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69595
msrc.microsoft.com
News mentions
5

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