CVE-2026-40405CWE-476

Windows TCP/IP Denial of Service Vulnerability

High · published May 12, 2026

CVSS v3.1

7.5

EPSS

1%

Percentile

67.3

In the wild

Unconfirmed

What it is

Null pointer dereference in Windows TCP/IP allows an unauthorized attacker to deny service over a network.

The record

Technical detail

CVSS v3.1: 7.5 · HIGH
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C
CVSS v4.0: Not supplied
EPSS: 0.01174 · 67.3th percentile
Weakness: CWE-476 · NULL Pointer Dereference
Published: 2026-05-12T16:58Z

EPSS history

Timeline

12 MAY 16:58Z
Windows TCP/IP Denial of Service Vulnerability
cvelistv5