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CVE-2026-50331 Microsoft CVE debrief

CVE-2026-50331 is a high-severity vulnerability in Windows Application Model, with a CVSS score of 7.8. The vulnerability is a use-after-free issue that allows an authorized attacker to elevate privileges locally. The CVE record was published on 2026-07-14T18:17:32.263Z and was last modified on 2026-07-16T05:16:22.220Z. This vulnerability affects Windows Application Model and has a high impact on the system's security. Administrators and users should be aware of this vulnerability and take necessary precautions to mitigate the risk. The NVD entry is currently Awaiting Analysis.

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
2026-07-22
Advisory published
2026-07-14
Advisory updated
2026-07-22

Who should care

Administrators and users of Windows Application Model should be aware of this vulnerability and take necessary precautions to mitigate the risk. This includes reviewing system configurations, applying patches or updates, and monitoring system logs for suspicious activity. Additionally, security teams and vulnerability management teams should prioritize this vulnerability due to its high severity and potential impact on system security.

Technical summary

The vulnerability is a use-after-free issue in Windows Application Model. An authorized attacker can exploit this vulnerability to elevate privileges locally. The CVSS vector for this vulnerability is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. This issue arises from improper handling of memory, allowing an attacker to access and manipulate sensitive data. The vulnerability has a high CVSS score, indicating a significant risk to affected systems.

Defensive priority

High

Recommended defensive actions

  • Apply patches or updates provided by the vendor
  • Implement compensating controls to limit the attack surface
  • Monitor system logs for suspicious activity
  • Conduct regular vulnerability assessments and penetration testing
  • Review and update incident response plans to address potential exploitation

Evidence notes

The CVE record was published on 2026-07-14T18:17:32.263Z and was last modified on 2026-07-16T05:16:22.220Z. The NVD entry is currently Awaiting Analysis. The source of this information is the NVD and CVE.org. The vulnerability has not been modified since its initial publication. Further analysis and verification are required to fully understand the impact and scope of this vulnerability.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-50331 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-50331

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

  • CVE-2026-50331 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-50331

    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.