Description
Improper input validation in Windows DNS allows an authorized attacker to perform spoofing over a network.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Microsoft | Windows Server 2016 | 10.0.14393.0 – < 10.0.14393.9688 | 10.0.14393.9688 |
| Microsoft | Windows Server 2016 (Server Core installation) | 10.0.14393.0 – < 10.0.14393.9688 | 10.0.14393.9688 |
| Microsoft | Windows Server 2019 | 10.0.17763.0 – < 10.0.17763.9487 | 10.0.17763.9487 |
| Microsoft | Windows Server 2019 (Server Core installation) | 10.0.17763.0 – < 10.0.17763.9487 | 10.0.17763.9487 |
| Microsoft | Windows Server 2022 | 10.0.20348.0 – < 10.0.20348.5870 | 10.0.20348.5870 |
| Microsoft | Windows Server 2025 | 10.0.26100.0 – < 10.0.26100.33822 | 10.0.26100.33822 |
| Microsoft | Windows Server 2025 (Server Core installation) | 10.0.26100.0 – < 10.0.26100.33822 | 10.0.26100.33822 |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
GitHub 1 repository
-
overgrowncarrot1/CVE-2026-119905-DNS-Log-Poisoning-UNC-Path ★ 2 · Aug 22, 2026
This shows how to poison a DNS log when you have dnsadmins and put in an UNC path, thus allowing you to capture the NetNTLMv2 Hash
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Advisories 2
- WID-SEC-2026-4478 Microsoft Windows: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 10, 2026
- MSRC-CVE-2026-119905 Windows DNS Spoofing Vulnerability Microsoft Security Response Center · Nov 10, 2026
References
- Windows DNS Spoofing Vulnerability vendor-advisory patch