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CVE-2026-50494 Microsoft CVE debrief

A high-severity vulnerability, CVE-2026-50494, exists in Windows NTFS, allowing an authorized attacker to execute code locally. This heap-based buffer overflow vulnerability has a CVSS score of 7.8. The vulnerability is classified as HIGH severity. System administrators and users of Windows operating systems should be aware of this vulnerability and take necessary precautions to mitigate the risk. The vulnerability is based on the NVD entry and the CVE record.

Vendor
Microsoft
Product
Windows 10 Version 1607
CVSS
HIGH 7.8
CISA KEV
Not listed in stored evidence
Original CVE published
2026-07-14
Original CVE updated
2026-07-21
Advisory published
2026-07-14
Advisory updated
2026-07-21

Who should care

System administrators and users of Windows operating systems should be aware of this vulnerability and take necessary precautions to mitigate the risk. The vulnerability affects Windows NTFS and has a CVSS score of 7.8. The vulnerability is classified as HIGH severity.

Technical summary

CVE-2026-50494 is a heap-based buffer overflow vulnerability in Windows NTFS. An authorized attacker can exploit this vulnerability to execute code locally. The vulnerability has a CVSS score of 7.8 and is classified as HIGH severity. The vulnerability affects Windows NTFS and has been confirmed by the NVD entry and the CVE record.

Defensive priority

High

Recommended defensive actions

  • Apply patches or updates provided by Microsoft to vulnerable systems.
  • Implement compensating controls, such as monitoring and intrusion detection systems.
  • Conduct regular vulnerability assessments and penetration testing to identify potential weaknesses.
  • Enforce least privilege access and ensure that users have only the necessary permissions to perform their tasks.
  • Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance.

Evidence notes

The CVE record was published on 2026-07-14T18:17:55.943Z and was last modified on 2026-07-21T18:24:07.037Z. The NVD entry is currently Analyzed. This information is based on the NVD entry and the CVE record. The vulnerability affects Windows NTFS and has a CVSS score of 7.8. The evidence is limited, and defenders should verify the affected scope and severity.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-50494 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-50494

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

  • CVE-2026-50494 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-50494

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

Supplemental references

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.