# CVE-2026-73024: Microsoft Windows Services for NFS heap buffer overflow in ONCRPC XDR Driver

Source: https://junglewise.ai/threats/cve-2026-73024-microsoft-windows-services-for-nfs-heap-buffer-overflow-in-oncrpc  
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-2026-73024 · Severity: high · CVSS 7.8 · Published 2026-09-08

Windows Services for NFS is a Microsoft component that enables Windows systems to communicate with NFS (Network File System) servers. A heap buffer overflow in its ONCRPC XDR driver allows an authorized local attacker to execute code with elevated privileges, potentially compromising the affected system's security and enabling full system takeover.

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-2026-73024 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-73024 being exploited in the wild.

**How severe is CVE-2026-73024?** High severity, with a CVSS score of 7.8, published 8 September 2026.

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

**Is there a fix for CVE-2026-73024?** 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-2026-73024 attacked?** It is attacked with local access.

**Am I affected by CVE-2026-73024?** 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 heap-based buffer overflow exists in the ONCRPC XDR driver component of Windows Services for NFS. An authorized attacker with local access can trigger the buffer overflow to corrupt heap memory and achieve privilege escalation. The vulnerability requires prior system access but does not require network connectivity. A fix is available through Microsoft security updates. This is a local privilege escalation vector that can be chained with other vulnerabilities to broaden attack impact.

## Affected products

- Microsoft Windows Services for NFS <unknown>

## Timeline

- 2026-09-08: disclosed

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-73024](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-73024)

## 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 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)
- [Microsoft Windows Services for NFS ONCRPC XDR Driver use after free](https://junglewise.ai/threats/cve-2026-69595-microsoft-windows-services-for-nfs-oncrpc-xdr-driver-use-after)