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9.8
CVE-2026-62878: Windows DNS Server Remote Code Execution
CVE-2026-62878
CVE-2026-62878
Summary
An attacker can execute malicious code on your DNS server if they gain access to it. This is a serious concern because an attacker could then access and control your network. To protect yourself, ensure that your DNS server is properly secured and patched with the latest updates.
What to do
No fix is available yet. Check with your software vendor for updates.
Affected software
| Vendor | Product | Affected versions |
|---|---|---|
| microsoft | windows 10 version 1607 | < 10.0.14393.9418 |
| microsoft | windows 10 version 1809 | < 10.0.17763.9115 |
| microsoft | windows server 2012 | < 6.2.9200.26279 |
| microsoft | windows server 2012 (server core installation) | < 6.2.9200.26279 |
| microsoft | windows server 2012 r2 | < 6.3.9600.23337 |
| microsoft | windows server 2012 r2 (server core installation) | < 6.3.9600.23337 |
| microsoft | windows server 2016 | < 10.0.14393.9418 |
| microsoft | windows server 2016 (server core installation) | < 10.0.14393.9418 |
| microsoft | windows server 2019 | < 10.0.17763.9115 |
| microsoft | windows server 2019 (server core installation) | < 10.0.17763.9115 |
| microsoft | windows server 2022 | < 10.0.20348.5499 |
| microsoft | windows server 2025 | < 10.0.26100.33296 |
| microsoft | windows server 2025 (server core installation) | < 10.0.26100.33296 |
Original title
Windows DNS Server Remote Code Execution Vulnerability
Original description
Stack-based buffer overflow in Windows DNS allows an unauthorized attacker to execute code over a network.
mitre CVSS3.1
9.8
Vulnerability type
CWE-121
Stack-based Buffer Overflow
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62878 vendor-advisory patch
Published: 11 Aug 2026 · Updated: 11 Aug 2026 · First seen: 11 Aug 2026