8.1
High
CVE-2026-40415 Use after free in Windows TCP/IP allows an unauthorized attacker to execute code over a network
Description
Use after free in Windows TCP/IP allows an unauthorized attacker to execute code over a network.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Windows 10 Version 1809 10.0 | 10.0.17763.0 → < 10.0.17763.8755 | 10.0.17763.8755 |
| Windows 10 Version 21H2 10.0 | 10.0.19044.0 → < 10.0.19044.7291 | 10.0.19044.7291 |
| Windows 10 Version 22H2 10.0 | 10.0.19045.0 → < 10.0.19045.7417 | 10.0.19045.7417 |
| Windows 11 version 22H3 10.0 | 10.0.22631.0 → < 10.0.22631.7079 | 10.0.22631.7079 |
| Windows 11 Version 23H2 10.0 | 10.0.22631.0 → < 10.0.22631.7219 | 10.0.22631.7219 |
| Windows 11 Version 24H2 10.0 | 10.0.26100.0 → < 10.0.26100.8457 | 10.0.26100.8457 |
| Windows 11 Version 25H2 10.0 | 10.0.26200.0 → < 10.0.26200.8457 | 10.0.26200.8457 |
| Windows 11 version 26H1 10.0 | 10.0.28000.0 → < 10.0.28000.2113 | 10.0.28000.2113 |
| Windows Server 2019 10.0 | 10.0.17763.0 → < 10.0.17763.8755 | 10.0.17763.8755 |
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| Product | Affected versions | Fixed in |
|---|---|---|
| Windows Server 2019 (Server Core installation) 10.0 | 10.0.17763.0 → < 10.0.17763.8755 | 10.0.17763.8755 |
| Windows Server 2022 10.0 | 10.0.20348.0 → < 10.0.20348.5139 | 10.0.20348.5139 |
| Windows Server 2022, 23H2 Edition (Server Core installation) 10.0 | 10.0.25398.0 → < 10.0.25398.2330 | 10.0.25398.2330 |
| Windows Server 2025 10.0 | 10.0.26100.0 → < 10.0.26100.32860 | 10.0.26100.32860 |
| Windows Server 2025 (Server Core installation) 10.0 | 10.0.26100.0 → < 10.0.26100.32860 | 10.0.26100.32860 |
References
- Windows TCP/IP Remote Code Execution Vulnerability msrc.microsoft.com
Timeline
- Published
- Last modified
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