CVE-2026-40415

HIGH

Microsoft Windows TCP/IP - Use-After-Free Remote Code Execution

Title source: manual
STIX 2.1

Description

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

References (1)

Core 1
Core References
Vendor Advisory vendor-advisory patch
Windows TCP/IP Remote Code Execution Vulnerability
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40415

Scores

CVSS v3 8.1
EPSS 0.0009
EPSS Percentile 25.5%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact total

Details

CWE
CWE-416
Status published
Products (25)
Microsoft/Windows 10 Version 1809 10.0.17763.0 - 10.0.17763.8755
Microsoft/Windows 10 Version 21H2 10.0.19044.0 - 10.0.19044.7291
Microsoft/Windows 10 Version 22H2 10.0.19045.0 - 10.0.19045.7291
Microsoft/Windows 11 version 22H3 10.0.22631.0 - 10.0.22631.7079
Microsoft/Windows 11 Version 23H2 10.0.22631.0 - 10.0.22631.7079
Microsoft/Windows 11 Version 24H2 10.0.26100.0 - 10.0.26100.8457
Microsoft/Windows 11 Version 25H2 10.0.26200.0 - 10.0.26200.8457
Microsoft/Windows 11 version 26H1 10.0.28000.0 - 10.0.28000.2113
Microsoft/Windows Server 2019 10.0.17763.0 - 10.0.17763.8755
Microsoft/Windows Server 2019 (Server Core installation) 10.0.17763.0 - 10.0.17763.8755
... and 15 more
Published May 12, 2026
Tracked Since May 12, 2026