VDB

CVE-2026-42904

CVE-2026-42904 PUBLISHED CVSS 9.6 CRITICAL

Reported by microsoft · Published June 9, 2026

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

Risk Scores

CVSS 3.1
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

Affected Products

VendorProductVersions
MicrosoftWindows 10 Version 21H210.0.19044.0
MicrosoftWindows 10 Version 22H210.0.19045.0
MicrosoftWindows 11 version 23H210.0.22631.0
MicrosoftWindows 11 Version 23H210.0.22631.0
MicrosoftWindows 11 Version 24H210.0.26100.0
MicrosoftWindows 11 Version 25H210.0.26200.0
MicrosoftWindows 11 version 26H110.0.28000.0
MicrosoftWindows Server 202210.0.20348.0
MicrosoftWindows Server 202510.0.26100.0
MicrosoftWindows Server 2025 (Server Core installation)10.0.26100.0
MicrosoftWindows 10 Version 21H210.0.19044.0, 10.0.19044.0, 10.0.19044.0
microsoftwindows_11_23H210.0.22631.0, 10.0.22631.0, 10.0.22631.0
MicrosoftWindows 10 Version 22H210.0.19045.0, 10.0.19045.0, 10.0.19045.0
microsoftwindows_10_22H210.0.19045.0, 10.0.19045.0, 10.0.19045.0
MicrosoftWindows 11 Version 23H210.0.22631.0, 10.0.22631.0, 10.0.22631.0
MicrosoftWindows 11 Version 25H210.0.26200.0, 10.0.26200.0, 10.0.26200.0
microsoftwindows_10_21H210.0.19044.0, 10.0.19044.0, 10.0.19044.0
MicrosoftWindows 11 version 26H110.0.28000.0, 10.0.28000.0, 10.0.28000.0
MicrosoftWindows 11 version 23H210.0.22631.0, 10.0.22631.0, 10.0.22631.0
microsoftwindows_server_202210.0.20348.0, 10.0.20348.0, 10.0.20348.0

…and 8 more

Timeline

  • Jun 9, 2026 CVE Published
  • Jun 10, 2026 Coalition ESS Score
  • Jun 10, 2026 Security Advisory
  • Jun 10, 2026 Security Advisory

References

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