8.1
High
CVE-2026-62820 Concurrent execution using shared resource with improper synchronization ('race condition') in Windows DNS allows an…
Description
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows DNS allows an unauthorized attacker to execute code over a network.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Windows 10 Version 1607 10.0 | 10.0.14393.0 → < 10.0.14393.9418 | 10.0.14393.9418 |
| Windows 10 Version 1809 10.0 | 10.0.17763.0 → < 10.0.17763.9121 | 10.0.17763.9121 |
| Windows Server 2016 10.0 | 10.0.14393.0 → < 10.0.14393.9418 | 10.0.14393.9418 |
| Windows Server 2016 (Server Core installation) 10.0 | 10.0.14393.0 → < 10.0.14393.9418 | 10.0.14393.9418 |
| Windows Server 2019 10.0 | 10.0.17763.0 → < 10.0.17763.9121 | 10.0.17763.9121 |
| Windows Server 2019 (Server Core installation) 10.0 | 10.0.17763.0 → < 10.0.17763.9121 | 10.0.17763.9121 |
| Windows Server 2022 10.0 | 10.0.20348.0 → < 10.0.20348.5499 | 10.0.20348.5499 |
| Windows Server 2025 10.0 | 10.0.26100.0 → < 10.0.26100.33296 | 10.0.26100.33296 |
| Windows Server 2025 (Server Core installation) 10.0 | 10.0.26100.0 → < 10.0.26100.33296 | 10.0.26100.33296 |
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