# CVE-2026-69595: Microsoft Windows Services for NFS ONCRPC XDR Driver use after free

Source: https://junglewise.ai/threats/cve-2026-69595-microsoft-windows-services-for-nfs-oncrpc-xdr-driver-use-after  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-08. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2026-69595 · Severity: critical · CVSS 9.8 · Published 2026-09-08

Windows Services for NFS is a Windows component that enables network file sharing using the NFS protocol. A use-after-free vulnerability in the ONCRPC XDR driver allows an attacker to execute arbitrary code remotely over the network without requiring authentication, potentially compromising the entire system.

Technologies: [Microsoft Windows Services for NFS](https://junglewise.ai/threats/technologies/windows-services-for-nfs). Vendors: [Microsoft](https://junglewise.ai/threats/vendors/microsoft).

## Quick answers

**Is CVE-2026-69595 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-69595 being exploited in the wild.

**How severe is CVE-2026-69595?** Critical severity, with a CVSS score of 9.8, published 8 September 2026.

**Which products and versions are affected?** Microsoft Windows Services for NFS <UNKNOWN>.

**Is there a fix for CVE-2026-69595?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-69595 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-69595?** Check whether you run Microsoft Windows Services for NFS at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A use-after-free vulnerability exists in the Windows Services for NFS ONCRPC XDR Driver, which handles data serialization/deserialization for NFS network communication. The vulnerability is remotely exploitable over the network without authentication requirements. An attacker can craft a malicious NFS request that triggers memory mismanagement, allowing code execution with the privileges of the NFS service. The network-reachable attack vector combined with lack of authentication requirements creates a high-impact remote code execution risk.

## Affected products

- Microsoft Windows Services for NFS <UNKNOWN>

## Timeline

- 2026-09-08: disclosed

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69595](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69595)

## Related threats

- [Microsoft Windows Services for NFS ONCRPC XDR Driver out-of-bounds read](https://junglewise.ai/threats/cve-2026-83989-microsoft-windows-services-for-nfs-oncrpc-xdr-driver-out-of)
- [Microsoft Windows Services for NFS use-after-free in ONCRPC XDR driver](https://junglewise.ai/threats/cve-2026-78445-microsoft-windows-services-for-nfs-use-after-free-in-oncrpc-xdr)
- [Microsoft Windows Services for NFS heap buffer overflow in ONCRPC XDR Driver](https://junglewise.ai/threats/cve-2026-73024-microsoft-windows-services-for-nfs-heap-buffer-overflow-in-oncrpc)
- [Microsoft Windows Services for NFS ONCRPC XDR Driver information disclosure](https://junglewise.ai/threats/cve-2026-71330-microsoft-windows-services-for-nfs-oncrpc-xdr-driver-information)
- [Microsoft Windows Services for NFS ONCRPC XDR driver use-after-free](https://junglewise.ai/threats/cve-2026-70585-microsoft-windows-services-for-nfs-oncrpc-xdr-driver-use-after)