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PatchSiren cyber security CVE debrief

CVE-2026-50492 Microsoft CVE debrief

A heap-based buffer overflow vulnerability exists in the Windows Resilient File System (ReFS). An unauthorized attacker could exploit this vulnerability with a physical attack to execute code. This vulnerability affects Windows 10, Windows 11, and Windows Server systems. The vulnerability has a CVSS score of 6.8 and a severity of MEDIUM. The vulnerability could allow an attacker to execute code on a vulnerable system with a physical attack. System administrators and users should be aware of this vulnerability and apply patches as available.

Vendor
Microsoft
Product
Windows 10 Version 1607
CVSS
MEDIUM 6.8
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 10, Windows 11, and Windows Server systems should be aware of this vulnerability and apply patches as available. This vulnerability could allow an attacker to execute code on a vulnerable system with a physical attack. System administrators should review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance.

Technical summary

The vulnerability is a heap-based buffer overflow in the Windows Resilient File System (ReFS). This could allow an attacker to execute code on a vulnerable system with a physical attack. The vulnerability has a CVSS score of 6.8 and a severity of MEDIUM. The vulnerability affects Windows 10, Windows 11, and Windows Server systems. Microsoft has released patches for this vulnerability, and system administrators should apply them as available.

Defensive priority

Apply patches as available; monitor system logs for suspicious activity; ensure physical security measures are in place; review compensating controls for exposed systems while remediation is scheduled and verified; check relevant monitoring, detection, and logs for exposed assets that need extra review.

Recommended defensive actions

  • Apply patches as available from Microsoft.
  • Monitor system logs for suspicious activity.
  • Ensure physical security measures are in place to prevent unauthorized access to vulnerable systems.
  • Review compensating controls for exposed systems while remediation is scheduled and verified.
  • Check relevant monitoring, detection, and logs for exposed assets that need extra review.

Evidence notes

The CVE record was published on 2026-07-14T18:17:55.640Z and was last modified on 2026-07-21T18:21:48.223Z. The NVD entry is currently Analyzed. This vulnerability affects Windows 10, Windows 11, and Windows Server systems. The vulnerability has a CVSS score of 6.8 and a severity of MEDIUM. There are no known ransomware campaigns using this vulnerability. The CVE record was created based on information from Microsoft and other sources. However, the details of the vulnerability, such as the attack vector and potential impact, are limited.

Official resources

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-07-14T18:17:55.640Z and has not been modified since then. The NVD entry is currently Analyzed.