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CVE-2026-50486 Microsoft CVE debrief

CVE-2026-50486 is a high-severity vulnerability in Windows Runtime that allows an authorized attacker to elevate privileges locally. The vulnerability has a CVSS score of 7.8 and is classified as HIGH. Microsoft has released a patch for this vulnerability, and users are advised to apply it as soon as possible. The vulnerability is a use-after-free issue in Windows Runtime, which could allow an attacker to execute arbitrary code or elevate privileges. The affected products include Windows 10, Windows 11, and Windows Server 2025. However, specific details about the vulnerability's impact and mitigations are limited, and defenders should review the official CVE record and NVD entry for further information.

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

Who should care

Users of Microsoft Windows 10, Windows 11, and Windows Server 2025 should apply the patch for CVE-2026-50486 as soon as possible to prevent potential privilege escalation attacks. Additionally, security teams and administrators responsible for managing and securing Windows-based systems should review the official CVE record and NVD entry for further information and guidance on mitigating this vulnerability.

Technical summary

The vulnerability is a use-after-free issue in Windows Runtime that allows an authorized attacker 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. The vulnerability affects multiple versions of Windows 10, Windows 11, and Windows Server 2025. The vulnerability could allow an attacker to execute arbitrary code or elevate privileges. Microsoft has released a patch for this vulnerability, and users are advised to apply it as soon as possible.

Defensive priority

High

Recommended defensive actions

  • Apply the patch released by Microsoft for CVE-2026-50486
  • Ensure that all systems are up-to-date with the latest security patches
  • Monitor systems for potential privilege escalation attacks
  • 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 2026-07-14T18:17:54.740Z and was last modified on 2026-07-21T18:17:14.773Z. The NVD entry is currently Analyzed. The vulnerability affects multiple versions of Windows 10, Windows 11, and Windows Server 2025. However, specific details about the affected versions and configurations are limited in the current CVE record and NVD entry. Defenders should verify the affected scope and configurations with Microsoft and review system updates for applicability.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-50486 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-50486

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

  • CVE-2026-50486 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-50486

    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.