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CVE-2026-58640 Microsoft CVE debrief

A high-severity vulnerability, CVE-2026-58640, has been identified in Windows NTFS, which could allow an authorized attacker to execute code locally. This vulnerability is caused by a heap-based buffer overflow. The vulnerability has a CVSS score of 7.3 and is classified as HIGH severity. The vulnerability affects Windows operating systems and could be exploited by an authorized attacker to execute code locally. The CVE record was published on 2026-07-14T17:17:14.083Z and last modified on 2026-07-17T02:34:39.180Z. The NVD entry is currently Analyzed. System administrators and users of Windows operating systems should be aware of this vulnerability and take necessary precautions to mitigate the risk.

Vendor
Microsoft
Product
Windows 10 Version 1607
CVSS
HIGH 7.3
CISA KEV
Not listed in stored evidence
Original CVE published
2026-07-14
Original CVE updated
2026-07-22
Advisory published
2026-07-14
Advisory updated
2026-07-22

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 operating systems and could be exploited by an authorized attacker to execute code locally. Further verification is needed to determine the full scope of the vulnerability.

Technical summary

CVE-2026-58640 is a heap-based buffer overflow vulnerability in Windows NTFS. An authorized attacker could exploit this vulnerability to execute code locally. The vulnerability has a CVSS score of 7.3 and is classified as HIGH severity. The vulnerability is caused by a heap-based buffer overflow in Windows NTFS, which allows an authorized attacker to execute code locally. The exact impact and affected systems are not explicitly stated. Further verification is needed to determine the full scope of the vulnerability.

Defensive priority

High priority should be given to patching this vulnerability, as it could allow an authorized attacker to execute code locally.

Recommended defensive actions

  • Apply the patch provided by Microsoft to vulnerable systems.
  • Ensure that all Windows operating systems are up-to-date with the latest security patches.
  • Monitor system logs for suspicious activity.
  • Implement additional security measures, such as access controls and intrusion detection systems.
  • Review compensating controls for exposed systems while remediation is scheduled and verified.

Evidence notes

The CVE record was published on 2026-07-14T17:17:14.083Z and last modified on 2026-07-17T02:34:39.180Z. The NVD entry is currently Analyzed. The vulnerability is caused by a heap-based buffer overflow in Windows NTFS. The CVE record was created based on information from Microsoft. The NVD provides additional details about the vulnerability, including its CVSS score and severity. However, the exact impact and affected systems are not explicitly stated. Further verification is needed to determine the full scope of the vulnerability.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-58640 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-58640

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

  • CVE-2026-58640 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-58640

    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.