CVE-2026-42904CWE-122

Windows TCP/IP Elevation of Privilege Vulnerability

Critical · published June 9, 2026

CVSS v3.1
9.6
EPSS
1%
Percentile
44.3
In the wild
Unconfirmed
What it is

Heap-based buffer overflow in Windows TCP/IP allows an unauthorized attacker to elevate privileges over an adjacent network.

The record
Technical detail
CVSS v3.1
9.6 · CRITICAL
Vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C
CVSS v4.0
Not supplied
EPSS
0.00535 · 44.3th percentile
Weakness
CWE-122 · Heap-based Buffer Overflow
Published
2026-06-09T17:05Z
EPSS history
Timeline
  • 09 JUN 17:05Z
    Windows TCP/IP Elevation of Privilege Vulnerability
    cvelistv5