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CVE-2026-49184 Microsoft CVE debrief

A high-severity vulnerability, CVE-2026-49184, has been identified in Windows NTFS, which could allow an unauthorized attacker to execute code locally. This vulnerability is caused by a heap-based buffer overflow. The vulnerability has a CVSS score of 8.4 and is classified as HIGH severity. 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 is caused by a heap-based buffer overflow, which could allow an attacker to execute code locally.

Vendor
Microsoft
Product
Windows 10 Version 1607
CVSS
HIGH 8.4
CISA KEV
Not listed in stored evidence
Original CVE published
2026-07-14
Original CVE updated
2026-07-22
Advisory published
2026-07-14
Advisory updated
2026-07-22

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.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-49184 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-49184

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-49184 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-49184

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.