CVE-2026-42915
Windows TCP/IP Denial of Service Vulnerability
CVSS Score
5.7
EPSS Score
0.0%
EPSS Percentile
0th
Incorrect calculation of buffer size in Windows TCP/IP allows an authorized attacker to deny service over an adjacent network.
| Vendor | microsoft |
| Product | windows 10 version 21h2 |
| Ecosystems | |
| Industries | TechnologyEnterprise |
| Published | Jun 9, 2026 |
| Last Updated | Jun 9, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
Microsoft / Windows 10 Version 21H2
10.0.19044.0 < 10.0.19044.7417
Microsoft / Windows 10 Version 22H2
10.0.19045.0 < 10.0.19045.7417
Microsoft / Windows 11 version 23H2
10.0.22631.0 < 10.0.22631.7219
Microsoft / Windows 11 Version 23H2
10.0.22631.0 < 10.0.22631.7219
Microsoft / Windows 11 Version 24H2
10.0.26100.0 < 10.0.26100.8655
Microsoft / Windows 11 Version 25H2
10.0.26200.0 < 10.0.26200.8655
Microsoft / Windows 11 version 26H1
10.0.28000.0 < 10.0.28000.2269
Microsoft / Windows Server 2022
10.0.20348.0 < 10.0.20348.5256
Microsoft / Windows Server 2025
10.0.26100.0 < 10.0.26100.32995
Microsoft / Windows Server 2025 (Server Core installation)
10.0.26100.0 < 10.0.26100.32995