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PatchSiren cyber security CVE debrief

CVE-2026-70113 Microsoft CVE debrief

An integer overflow or wraparound vulnerability exists in Windows Client for NFS, allowing an authorized attacker to elevate privileges locally. Multiple Windows versions and server releases are affected, including Windows 10, Windows 11, and Windows Server 2012 through 2025. The vulnerability has been patched by Microsoft, and defenders should prioritize patching affected systems to prevent local privilege escalation. Affected product deployments should be reviewed for exposure, and compensating controls should be considered for exposed systems.

Vendor
Microsoft
Product
Windows 10 Version 1607
CVSS
HIGH 7.8
CISA KEV
Not listed in stored evidence
Original CVE published
2026-10-13
Original CVE updated
2026-10-13
Advisory published
2026-10-13
Advisory updated
2026-10-13

Who should care

Defenders responsible for Windows systems, especially those with privilege escalation concerns, should assess exposure and prioritize patching.

Why it matters

CVE-2026-70113 is a high-severity vulnerability in Windows Client for NFS that allows local privilege escalation. Defenders should prioritize patching affected systems.

  • Local privilege escalation is possible
  • Patching vulnerable installations is necessary
  • Monitoring for exploitation attempts is recommended

Technical summary

The vulnerability exists in Windows Client for NFS due to an integer overflow or wraparound issue. An authorized attacker can exploit this vulnerability to elevate privileges locally. The vulnerability has been patched by Microsoft, and defenders should prioritize patching affected systems to prevent local privilege escalation. Affected product context and defensive impact should be considered when assessing exposure.

Defensive priority

Defenders should prioritize patching vulnerable Windows Client for NFS installations, especially in environments where privilege escalation is a concern.

Recommended defensive actions

  • Patch vulnerable Windows Client for NFS installations
  • Verify and apply updates for affected Windows versions
  • Monitor for local privilege escalation attempts

Evidence notes

The CVE Program and NVD provide official records of the vulnerability. Microsoft has released a patch for the vulnerability. The vulnerability affects multiple Windows versions and server releases, including Windows 10, Windows 11, and Windows Server 2012 through 2025. Official CVE Program record and NIST NVD vulnerability detail pages provide additional information. Defenders should verify affected scope, severity, and vendor guidance.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-70113 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-70113

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-70113 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-70113

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

  • Windows Client for NFS Elevation of Privilege Vulnerability

    Unverified legacy reference

    URL: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/70xxx/CVE-2026-70113.json

    cve_program_cvelist_v5

  • Source reference

    Unverified legacy reference

    URL: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70113

    Supplemental source - vendor-advisory, patch

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.