CVE-2026-49184 Microsoft CVE debrief

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 NTFS and has a CVSS score of 8.4, classified as HIGH severity. System administrators and users should review and update incident response plans to address potential exploitation.

Technical summary

CVE-2026-49184 is a heap-based buffer overflow vulnerability in Windows NTFS. An unauthorized attacker could exploit this vulnerability to execute code locally. The vulnerability has a CVSS score of 8.4 and is classified as HIGH severity. The vulnerability affects Windows NTFS and is caused by a heap-based buffer overflow. The CVE record was published on 2026-07-14T17:16:53.580Z and was last modified on 2026-07-20T13:30:15.150Z.

Defensive priority

High

Recommended defensive actions

• Apply patches or updates provided by Microsoft to vulnerable systems
• Implement compensating controls, such as monitoring and intrusion detection
• Conduct inventory checks to identify vulnerable systems
• Consider implementing additional security measures, such as access controls and segmentation
• Review and update incident response plans to address potential exploitation

Evidence notes

The CVE record was published on 2026-07-14T17:16:53.580Z and was last modified on 2026-07-20T13:30:15.150Z. The NVD entry is currently Analyzed. The vulnerability affects Windows NTFS and has a CVSS score of 8.4, classified as HIGH severity. There are no known ransomware campaign uses. The CVE record was provided by the CVE Numbering Authority and is maintained by the MITRE Corporation. The NVD entry provides additional details and is maintained by the National Institute of Standards and Technology.

Official resources