7.5
High
CVE-2025-26634 Heap-based buffer overflow in Windows Core Messaging allows an authorized attacker to elevate privileges over a network
Description
Heap-based buffer overflow in Windows Core Messaging allows an authorized attacker to elevate privileges over a network.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Windows 10 Version 1809 10.0 | 10.0.17763.0 → < 10.0.17763.6893 | 10.0.17763.6893 |
| Windows Server 2019 10.0 | 10.0.17763.0 → < 10.0.17763.6893 | 10.0.17763.6893 |
| Windows Server 2019 (Server Core installation) 10.0 | 10.0.17763.0 → < 10.0.17763.6893 | 10.0.17763.6893 |
| Windows Server 2022 10.0 | 10.0.20348.0 → < 10.0.20348.3207 | 10.0.20348.3207 |
| Windows 10 Version 21H2 10.0 | 10.0.19044.0 → < 10.0.19044.5487 | 10.0.19044.5487 |
| Windows 11 version 22H2 10.0 | 10.0.22621.0 → < 10.0.22621.4890 | 10.0.22621.4890 |
| Windows 10 Version 22H2 10.0 | 10.0.19045.0 → < 10.0.19045.5487 | 10.0.19045.5487 |
| Windows Server 2025 (Server Core installation) 10.0 | 10.0.26100.0 → < 10.0.26100.3194 | 10.0.26100.3194 |
| Windows 11 version 22H3 10.0 | 10.0.22631.0 → < 10.0.22631.4890 | 10.0.22631.4890 |
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| Product | Affected versions | Fixed in |
|---|---|---|
| Windows 11 Version 23H2 10.0 | 10.0.22631.0 → < 10.0.22631.4890 | 10.0.22631.4890 |
| Windows Server 2022, 23H2 Edition (Server Core installation) 10.0 | 10.0.25398.0 → < 10.0.25398.1425 | 10.0.25398.1425 |
| Windows 11 Version 24H2 10.0 | 10.0.26100.0 → < 10.0.26100.3194 | 10.0.26100.3194 |
| Windows Server 2025 10.0 | 10.0.26100.0 → < 10.0.26100.3194 | 10.0.26100.3194 |
| Windows 10 Version 1507 10.0 | 10.0.10240.0 → < 10.0.10240.20915 | 10.0.10240.20915 |
| Windows 10 Version 1607 10.0 | 10.0.14393.0 → < 10.0.14393.7785 | 10.0.14393.7785 |
| Windows Server 2016 10.0 | 10.0.14393.0 → < 10.0.14393.7785 | 10.0.14393.7785 |
| Windows Server 2016 (Server Core installation) 10.0 | 10.0.14393.0 → < 10.0.14393.7785 | 10.0.14393.7785 |
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