CVE-2026-62878
Critical
Description
Stack-based buffer overflow in Windows DNS allows an unauthorized attacker to execute code over a network.
SeverityCritical
CVSS9.8
Exploit probability—
Product
Microsoft Windows
PublishedAug 11, 2026
First seenAug 11, 2026
Weakness typeCWE-121CWE-121
How to fix
Update
- microsoft windows_10_160710.0.14393.9418 or later
- microsoft windows_10_180910.0.17763.9121 or later
- microsoft windows_server_201610.0.14393.9418 or later
- microsoft windows_server_201910.0.17763.9121 or later
- microsoft windows_server_202210.0.20348.5440 or later
- microsoft windows_server_202510.0.26100.33222 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| microsoft windows_10_1607 | v < 10.0.14393.9418 | 10.0.14393.9418 |
| microsoft windows_10_1809 | v < 10.0.17763.9121 | 10.0.17763.9121 |
| microsoft windows_server_2012 | No range specified, r2 | — |
| microsoft windows_server_2016 | v < 10.0.14393.9418 | 10.0.14393.9418 |
| microsoft windows_server_2019 | v < 10.0.17763.9121 | 10.0.17763.9121 |
| microsoft windows_server_2022 | v < 10.0.20348.5440 | 10.0.20348.5440 |
| microsoft windows_server_2025 | v < 10.0.26100.33222 | 10.0.26100.33222 |
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