CVE-2026-34345CWE-362CWE-416

Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability

High · published May 12, 2026

CVSS v3.1
7.0
EPSS
0%
Percentile
9.7
In the wild
Unconfirmed
What it is

Access of resource using incompatible type ('type confusion') in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.

The record
Technical detail
CVSS v3.1
7.0 · HIGH
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
CVSS v4.0
Not supplied
EPSS
0.00202 · 9.7th percentile
Weaknesses
CWE-362 · Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition'); CWE-416 · Use After Free
Published
2026-05-12T16:58Z
EPSS history
Timeline
  • 12 MAY 16:58Z
    Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability
    cvelistv5