Use after free in Windows TCP/IP allows an unauthorized attacker to execute code over a network.
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40415
https://securityaffairs.com/192086/uncategorized/microsoft-patch-tuesday-for-may-2026-fix-138-bugs-some-of-them-are-alarming.html
Source: Mitre, NVD
Published: 2026-05-12
Updated: 2026-05-13
Base Score: 7.6
Vector: CVSS2#AV:N/AC:H/Au:N/C:C/I:C/A:C
Severity: High
Base Score: 8.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS: 0.00086
