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CVE-2026-50362 Microsoft CVE debrief

A heap-based buffer overflow vulnerability exists in the Windows Resilient File System (ReFS). This vulnerability allows an unauthorized attacker to execute code locally. The vulnerability has a CVSS score of 7.8 and is classified as HIGH severity. It affects various versions of Windows 10, Windows 11, and Windows Server. System administrators and users should take action to mitigate this vulnerability.

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
2026-07-20
Advisory published
2026-07-14
Advisory updated
2026-07-20

Who should care

System administrators and users of Windows 10, Windows 11, and Windows Server are advised to take action as this vulnerability could allow an attacker to execute code locally. Operators, security teams, and vulnerability management teams should prioritize patching and review system configurations.

Technical summary

The vulnerability is caused by a heap-based buffer overflow in the Windows Resilient File System (ReFS). An attacker could exploit this vulnerability by tricking a user into opening a specially crafted file or application, allowing them to execute code locally. The vulnerability affects various versions of Windows 10, Windows 11, and Windows Server. Microsoft has provided a patch to address this vulnerability.

Defensive priority

High priority should be given to patching this vulnerability as it could allow an attacker to execute code locally. Defenders should focus on patching, monitoring, and implementing compensating controls.

Recommended defensive actions

  • Apply the patch provided by Microsoft
  • Ensure all systems are up-to-date with the latest security patches
  • Monitor systems for suspicious activity
  • Implement additional security measures such as firewall rules and intrusion detection systems
  • Review compensating controls for exposed systems while remediation is scheduled and verified

Evidence notes

The CVE record was published on 2026-07-14T18:17:36.580Z and was last modified on 2026-07-20T15:10:59.107Z. The NVD entry is currently Analyzed. The vulnerability affects various versions of Windows 10, Windows 11, and Windows Server. There is no evidence of public exploitation or widespread impact. Defenders should verify system configurations and patch levels.

Official resources

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-07-14T18:17:36.580Z and has not been modified since then. The NVD entry is currently Analyzed.