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PatchSiren cyber security CVE debrief

CVE-2026-50425 Microsoft CVE debrief

CVE-2026-50425 is a high-severity vulnerability in Windows Internal System User Profile, classified as a use-after-free issue. An authorized attacker can exploit this vulnerability to elevate privileges locally. The vulnerability has a CVSS score of 7.8 and is considered high-severity. Microsoft has released a patch for this vulnerability, and users should apply it immediately. System administrators and users of Windows 10, Windows 11, and Windows Server 2025 should be aware of this vulnerability and take steps to mitigate it.

Vendor
Microsoft
Product
Windows 10 Version 21H2
CVSS
HIGH 7.8
CISA KEV
Not listed in stored evidence
Original CVE published
2026-07-14
Original CVE updated
2026-07-23
Advisory published
2026-07-14
Advisory updated
2026-07-23

Who should care

System administrators and users of Windows 10, Windows 11, and Windows Server 2025 should be aware of this vulnerability and take steps to mitigate it. They should review their systems for potential exposure, apply the patch released by Microsoft, and consider implementing additional security measures.

Technical summary

The vulnerability is a use-after-free issue in the Windows Internal System User Profile. An attacker with local access can exploit this vulnerability to elevate privileges. The vulnerability has a CVSS score of 7.8 and is considered high-severity. Microsoft has released a patch for this vulnerability, which should be applied immediately. Users should ensure that all Windows systems are up-to-date with the latest security patches and consider implementing additional security measures such as multi-factor authentication and least privilege access.

Defensive priority

High

Recommended defensive actions

  • Apply the patch released by Microsoft
  • Ensure that all Windows systems are up-to-date with the latest security patches
  • Monitor systems for suspicious activity
  • Implement additional security measures such as multi-factor authentication and least privilege access
  • Review compensating controls for exposed systems while remediation is scheduled and verified

Evidence notes

The CVE record was published on 2026-07-14T18:17:45.990Z and was last modified on 2026-07-21T02:58:08.777Z. The NVD entry is currently Analyzed. This vulnerability affects Windows 10, Windows 11, and Windows Server 2025. Microsoft has released a patch for this vulnerability. Users should verify their systems are up-to-date and consider additional security measures.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-50425 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-50425

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

  • CVE-2026-50425 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-50425

    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.