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CVE-2026-50503 Microsoft CVE debrief

CVE-2026-50503 is a high-severity vulnerability in Windows Runtime that allows an authorized attacker to elevate privileges locally due to a race condition. The vulnerability has a CVSS score of 7 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 caused by a race condition in Windows Runtime, which allows an authorized attacker to elevate privileges locally. System administrators and users of Windows 11 and Windows Server 2025 should be aware of this vulnerability and take necessary precautions to mitigate the risk.

Vendor
Microsoft
Product
Windows 11 Version 24H2
CVSS
HIGH 7
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 users of Windows 11 and Windows Server 2025 should be aware of this vulnerability and take necessary precautions to mitigate the risk. The vulnerability has a high severity and can allow an authorized attacker to elevate privileges locally.

Technical summary

The vulnerability is caused by a race condition in Windows Runtime, which allows an authorized attacker to elevate privileges locally. The vulnerability has been analyzed by the NVD and has a CVSS vector of CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H. The vulnerability affects Windows 11 and Windows Server 2025 systems.

Defensive priority

High

Recommended defensive actions

  • Apply the patch released by Microsoft
  • Ensure that Windows 11 and Windows Server 2025 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 vulnerability is documented in the NVD and has been analyzed by Microsoft. The CVE record was published on 2026-07-14T18:17:57.470Z and was last modified on 2026-07-22T14:29:09.020Z. The evidence is limited, and defenders should verify the affected scope and severity with the vendor. The vulnerability affects Windows 11 and Windows Server 2025 systems.

Official resources

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-07-14T18:17:57.470Z and has not been modified since then.