CVE-2026-50312: Use after free in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.

Details

Source

NVD Recent CVEs (US · database · site)

Severity

medium — CVSS 4.7

Published

2026-07-14

Last updated

2026-07-16

Exploitation

Not in CISA KEV at last sync

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2026-50312

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

• Low exploitation riskCVE-2026-503120.33% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 25% of all scored CVEs.

Referenced CVEs

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

• critical[NEW] [critical] Microsoft Windows products: Multiple vulnerabilitiescert-bund
• unknownexploitedNCSC-2026-0231 [1.00] [M/H] Vulnerabilities fixed in Microsoft Windowsncsc-nl
• mediumCVE-2026-50312: Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerabilitymsrc

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