Quick answers
- Is CVE-2026-109463 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-109463 being exploited in the wild.
- How severe is CVE-2026-109463?
- High severity, with a CVSS score of 8.8, published 10 November 2026.
- Which products and versions are affected?
- Microsoft Windows DNS.
- Is there a fix for CVE-2026-109463?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-109463 attacked?
- It is attacked over the network, in an operating system.
- Am I affected by CVE-2026-109463?
- Check whether you run Microsoft Windows DNS. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
Deserialization of untrusted data in Windows DNS service allows remote code execution without requiring authentication or user interaction. The vulnerability exists in DNS protocol handling and can be exploited over the network to execute arbitrary code with system privileges.
Affected products
- Microsoft Windows DNS
Timeline
- 2026-11-10: disclosed