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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
2026-07-17
Advisory published
2026-07-14
Advisory updated
2026-07-17

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.

Official resources

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-07-14T17:17:14.083Z and has not been modified since then. The NVD entry is currently Analyzed.