CVE-2026-42904

critical Microsoft
CVSS v3 Base Score
9.6
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C
Attack Characteristics
Attack Vector
Adjacent
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Confidentiality
High
Integrity
High
Availability
High
Published: June 9, 2026 (30 days ago)
Last Modified: June 10, 2026
Vendor: Microsoft
Source: MITRE

Description

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

CWE

CWE-122

Affected Products

Microsoft Windows 10 Version 21H2Microsoft Windows 10 Version 22H2Microsoft Windows 11 version 23H2Microsoft Windows 11 Version 23H2Microsoft Windows 11 Version 24H2Microsoft Windows 11 Version 25H2Microsoft Windows 11 version 26H1Microsoft Windows Server 2022Microsoft Windows Server 2025Microsoft Windows Server 2025 (Server Core installation)

References

🔗 msrc.microsoft.com