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CVE-2026-50436 Microsoft CVE debrief

CVE-2026-50436 is a high-severity vulnerability in the Windows Kernel, allowing an authorized attacker to elevate privileges locally. The vulnerability has a CVSS score of 7.8 and is classified as HIGH. This use-after-free issue in the Windows Kernel can be exploited by an authorized attacker to gain elevated privileges. System administrators and security teams should be aware of this vulnerability and take necessary actions to mitigate it. The vulnerability affects Windows Kernel systems, and defenders should review system configurations to ensure proper access controls.

Vendor
Microsoft
Product
Windows 11 Version 24H2
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

System administrators and security teams responsible for Windows Kernel systems should be aware of this vulnerability and take necessary actions to mitigate it. They should review system configurations to ensure proper access controls and monitor system logs for suspicious activity.

Technical summary

The vulnerability is a use-after-free issue in the Windows Kernel, which allows an authorized attacker to elevate privileges locally. The CVSS vector is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. The vulnerability can be exploited by an authorized attacker to gain elevated privileges. Defenders should review system configurations to ensure proper access controls and monitor system logs for suspicious activity.

Defensive priority

High priority should be given to patching this vulnerability, as it allows for local privilege escalation.

Recommended defensive actions

  • Apply the patch provided by Microsoft
  • Review and update system configurations to ensure proper access controls
  • Monitor system logs for suspicious activity
  • Implement additional security measures, such as least privilege access and regular vulnerability scanning
  • Review compensating controls for exposed systems while remediation is scheduled and verified

Evidence notes

The CVE record was published on 2026-07-14T18:17:47.717Z and last modified on 2026-07-21T15:01:48.737Z. The NVD entry is currently Analyzed. The vulnerability has a CVSS score of 7.8 and is classified as HIGH. The Windows Kernel vulnerability allows an authorized attacker to elevate privileges locally. Evidence of exploitation is not currently available, but defenders should verify system configurations and monitor for suspicious activity.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-50436 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-50436

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

  • CVE-2026-50436 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-50436

    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.