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PatchSiren cyber security CVE debrief

CVE-2026-50413 Microsoft CVE debrief

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-07-14T18:17:44.287Z and has not been modified since then. The NVD entry is currently Analyzed. This vulnerability, a use-after-free issue in Windows Runtime, allows an authorized attacker to elevate privileges locally, posing a high severity risk with a CVSS score of 8.8. System administrators and security teams should be aware of this vulnerability and take necessary actions to mitigate the risk. The vulnerability affects various versions of Windows 11 and Windows Server 2025.

Vendor
Microsoft
Product
Windows 11 Version 24H2
CVSS
HIGH 8.8
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

System administrators and security teams responsible for Windows 11 and Windows Server 2025 systems should be aware of this vulnerability and take necessary actions to mitigate the risk. They should prioritize patching affected systems, monitor for suspicious activity, and implement compensating controls if necessary.

Technical summary

The vulnerability is a use-after-free issue in Windows Runtime, which allows an authorized attacker to elevate privileges locally. The CVSS score for this vulnerability is 8.8, indicating a high severity level. The vulnerability affects various versions of Windows 11 and Windows Server 2025. Microsoft has provided a patch for this vulnerability, and system administrators should prioritize patching affected systems.

Defensive priority

High priority should be given to patching affected systems, as the vulnerability allows for local privilege escalation. Defenders should verify patch deployment, monitor for suspicious activity, and implement compensating controls if necessary.

Recommended defensive actions

  • Apply the patch provided by Microsoft
  • Ensure all Windows 11 and Windows Server 2025 systems are updated with the latest security patches
  • Monitor systems for suspicious activity
  • Implement compensating controls, such as restricting access to sensitive areas
  • Review compensating controls for exposed systems while remediation is scheduled and verified

Evidence notes

The CVE record and NVD detail provide information on the vulnerability, its severity, and affected systems. Microsoft has provided a patch for this vulnerability. The vulnerability is a use-after-free issue in Windows Runtime, which allows an authorized attacker to elevate privileges locally. The CVSS score for this vulnerability is 8.8, indicating a high severity level. The vulnerability affects various versions of Windows 11 and Windows Server 2025. There is no evidence of exploitation in the wild, but defenders should verify patch deployment and monitor for suspicious activity.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-50413 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-50413

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

  • CVE-2026-50413 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-50413

    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.