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CVE-2026-45636 Microsoft CVE debrief

CVE-2026-45636 is a high-severity vulnerability in Windows NTFS that allows an unauthorized attacker to execute code locally. The vulnerability has a CVSS score of 7.8 and was published on 2026-06-09T17:17:30.270Z. It affects various versions of Windows 10, Windows 11, and Windows Server.

Vendor
Microsoft
Product
Windows 10 Version 1607
CVSS
HIGH 7.8
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-09
Original CVE updated
2026-06-11
Advisory published
2026-06-09
Advisory updated
2026-06-11

Who should care

Administrators and users of Windows 10, Windows 11, and Windows Server should be aware of this vulnerability and take necessary actions to mitigate it.

Technical summary

The vulnerability is a heap-based buffer overflow in Windows NTFS. It allows an attacker to execute code locally, which can lead to a compromise of the system.

Defensive priority

High

Recommended defensive actions

  • Apply patches from Microsoft as soon as possible.
  • Use secure coding practices to prevent similar vulnerabilities in the future.
  • Monitor systems for suspicious activity.

Evidence notes

The vulnerability is confirmed by Microsoft and has a CVSS score of 7.8.

Official resources

CVE-2026-45636 was published on 2026-06-09T17:17:30.270Z and modified on 2026-06-11T18:33:29.877Z.