Description
Use after free in Windows Runtime allows an authorized attacker to elevate privileges locally.
Published: 2026-07-14
Score: 7.8 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Impact

The vulnerability is a use‑after‑free flaw in the Windows Runtime that, when triggered by an authorized user, permits the execution of code with elevated privileges. It involves a data race condition (CWE-362) and a memory safety issue (CWE-416). An attacker who can initiate the exploit locally could gain higher privileges, potentially affecting the entire system.

Affected Systems

Microsoft Windows 10 versions 1809, 21H2, 22H2; Microsoft Windows 11 versions 24H2, 25H2, 26H1; Microsoft Windows Server 2019 and Server Core; Microsoft Windows Server 2025 and Server Core.

Risk and Exploitability

The CVSS score of 7.8 reflects a high impact of the flaw, while the EPSS score of less than 1% suggests an unlikely exploitation rate at this time. The vulnerability is not listed in the CISA KEV catalog. The attack vector is inferred to be local, requiring an authenticated attacker to trigger the use‑after‑free and elevate privileges.

Generated by OpenCVE AI on July 31, 2026 at 07:51 UTC.

Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

  • Apply the Microsoft security update for CVE‑2026‑50457 to all affected Windows and Server versions
  • Enforce least privilege for local user accounts to limit the potential damage if elevation occurs
  • Enable and review Windows Runtime related event logs to detect possible exploitation attempts

Generated by OpenCVE AI on July 31, 2026 at 07:51 UTC.

Tracking

Sign in to view the affected projects.

Advisories

No advisories yet.

History

Wed, 15 Jul 2026 12:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

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

Tue, 14 Jul 2026 17:45:00 +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 10 1809
Microsoft windows 10 21h2
Microsoft windows 10 22h2
Microsoft windows 11 24h2
Microsoft windows 11 25h2
Microsoft windows 11 26h1
Microsoft windows Server 2019
Microsoft windows Server 2025
Weaknesses CWE-362
CWE-416
CPEs cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x86:*
cpe:2.3:o:microsoft:windows_10_21H2:*:*:*:*:*:*:x86:*
cpe:2.3:o:microsoft:windows_10_22H2:*:*:*:*:*:*:x64:*
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_2019:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*
Vendors & Products Microsoft
Microsoft windows 10 1809
Microsoft windows 10 21h2
Microsoft windows 10 22h2
Microsoft windows 11 24h2
Microsoft windows 11 25h2
Microsoft windows 11 26h1
Microsoft windows Server 2019
Microsoft windows Server 2025
References
Metrics cvssV3_1

{'score': 7.8, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C'}

Subscriptions

Microsoft Windows 10 1809 Windows 10 21h2 Windows 10 22h2 Windows 11 24h2 Windows 11 25h2 Windows 11 26h1 Windows Server 2019 Windows Server 2025
cve-icon MITRE

Status: PUBLISHED

Assigner: microsoft

Published:

Updated: 2026-08-03T22:55:47.657Z

Reserved: 2026-06-04T18:59:17.977Z

Link: CVE-2026-50457

cve-icon Vulnrichment

Updated: 2026-07-15T10:52:08.305Z

cve-icon NVD

No data.

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-07-31T08:00:04Z

Weaknesses
  • CWE-362

    Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

  • CWE-416

    Use After Free