Description
Use after free in Windows Runtime allows an authorized attacker to elevate privileges locally.
Published: 2026-07-14
Score: 7 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Impact

A use‑after‑free flaw in Windows Runtime allows an authorized local attacker to elevate privileges inside the operating system. The vulnerability is classified as CWE‑416 and can be abused to gain higher levels of access than the current user holds.

Affected Systems

Affected are Microsoft Windows 11 24H2, 25H2, and 26H1, as well as Windows Server 2025 including Server Core installations. Versions 24H2 and 25H2 are available on ARM64 architectures, while version 26H1 and the server releases target x64 platforms.

Risk and Exploitability

The CVSS score of 7.0 indicates high severity, but the EPSS score of less than 1% shows a low current exploitation probability. Successful exploitation requires local, authorized access, and the vulnerability is not listed in the CISA KEV catalog, meaning it is not currently part of large‑scale active exploitation.

Generated by OpenCVE AI on July 31, 2026 at 08:48 UTC.

Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

  • Apply the Windows update that addresses CVE-2026-50323 as published by Microsoft
  • Restart the affected systems to complete the update installation
  • If a patch cannot be applied immediately, enforce strict least‑privilege policies for local accounts to reduce the risk of escalation

Generated by OpenCVE AI on July 31, 2026 at 08:48 UTC.

Tracking

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Advisories

No advisories yet.

History

Wed, 15 Jul 2026 11:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Tue, 14 Jul 2026 17:15:00 +0000

Type Values Removed Values Added
Description Use after free in Windows Runtime allows an authorized attacker to elevate privileges locally.
Title Windows Runtime Elevation of Privilege Vulnerability
First Time appeared Microsoft
Microsoft windows 11 24h2
Microsoft windows 11 25h2
Microsoft windows 11 26h1
Microsoft windows Server 2025
Weaknesses CWE-416
CPEs cpe:2.3:o:microsoft:windows_11_24H2:*:*:*:*:*:*:arm64:*
cpe:2.3:o:microsoft:windows_11_25H2:*:*:*:*:*:*:arm64:*
cpe:2.3:o:microsoft:windows_11_26H1:*:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*
Vendors & Products Microsoft
Microsoft windows 11 24h2
Microsoft windows 11 25h2
Microsoft windows 11 26h1
Microsoft windows Server 2025
References
Metrics cvssV3_1

{'score': 7, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C'}

Subscriptions

Microsoft Windows 11 24h2 Windows 11 25h2 Windows 11 26h1 Windows Server 2025
cve-icon MITRE

Status: PUBLISHED

Assigner: microsoft

Published:

Updated: 2026-08-03T22:54:28.942Z

Reserved: 2026-06-04T18:15:10.951Z

Link: CVE-2026-50323

cve-icon Vulnrichment

Updated: 2026-07-15T10:50:32.913Z

cve-icon NVD

No data.

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-07-31T09:00:07Z

Weaknesses