MicrosoftCVE-2026-61920
Microsoft Windows DNS: race condition
Medium6.6CVE-2026-61920 · Published Aug 11, 2026 · updated Sep 2, 2026
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows DNS allows an authorized attacker to execute code over a network.
Affected versions
| Package | Affected | Fixed in |
|---|---|---|
| Windows Server 2012 R2 Product | >= 6.3.9600.0, < 6.3.9600.23338 | 6.3.9600.23338 |
| Windows Server 2012 R2 (Server Core installation) Product | >= 6.3.9600.0, < 6.3.9600.23338 | 6.3.9600.23338 |
| Windows Server 2016 Product | >= 10.0.14393.0, < 10.0.14393.9418 | 10.0.14393.9418 |
| Windows Server 2016 (Server Core installation) Product | >= 10.0.14393.0, < 10.0.14393.9418 | 10.0.14393.9418 |
| Windows Server 2019 Product | >= 10.0.17763.0, < 10.0.17763.9121 | 10.0.17763.9121 |
| Windows Server 2019 (Server Core installation) Product | >= 10.0.17763.0, < 10.0.17763.9121 | 10.0.17763.9121 |
| Windows Server 2022 Product | >= 10.0.20348.0, < 10.0.20348.5499 | 10.0.20348.5499 |
| Windows Server 2025 Product | >= 10.0.26100.0, < 10.0.26100.33296 | 10.0.26100.33296 |
| Windows Server 2025 (Server Core installation) Product | >= 10.0.26100.0, < 10.0.26100.33296 | 10.0.26100.33296 |
Details and references
More Microsoft advisories
All Microsoft| Date | Advisory | Severity | Fixed in |
|---|---|---|---|
| Aug 11 | Copilot Chat Security Feature Bypass Vulnerability | High7.1 | 1.132.1 |
| Aug 11 | Copilot Custom Agent Hook Remote Code Execution Vulnerability | High7.8 | 1.132.1 |
| Aug 11 | Information disclosure vulnerability | Medium | 1.132.1 |
| Aug 11 | Fileless RCE in VS Code Web Remote Terminal via URL-Controlled NODE_OPTIONS | High8.8 | 1.132.1 |
| Aug 11 | Visual Studio Code web deployments - environmentService.ts - RCE via NODE_OPTIONS --import from URL payload | High8.8 | 1.132.1 |
| Aug 11 | TerminalInstance._createProcess - Workspace Trust bypass via terminal waitOnExit | High7.8 | 1.132.1 |