CVE-2026-42904

critical

Description

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

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42904

Details

Source: Mitre, NVD

Published: 2026-06-09

Updated: 2026-06-09

Risk Information

CVSS v2

Base Score: 8.3

Vector: CVSS2#AV:A/AC:L/Au:N/C:C/I:C/A:C

Severity: High

CVSS v3

Base Score: 9.6

Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Severity: Critical