CVE-2026-40406 HIGH

CVE-2026-40406: Windows TCP/IP Information Disclosure Vulnerability

Vendor Microsoft
Product Windows 10 Version 1607
Weakness CWE-416
Published May 12, 2026
Last update June 9, 2026
View on NVD All CVEs

CVSS base score

7.5/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality High
Integrity None

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C

What the vulnerability does

01Description

Use after free in Windows TCP/IP allows an unauthorized attacker to disclose information over a network.

Key dates

02Disclosure timeline

May 12, 2026 CVE published
June 9, 2026 Record updated