Quick answers
- Is CVE-2026-105559 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-105559 being exploited in the wild.
- How severe is CVE-2026-105559?
- Medium severity, with a CVSS score of 6.5, published 10 November 2026.
- Which products and versions are affected?
- Microsoft Windows Active Directory.
- Is there a fix for CVE-2026-105559?
- 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-2026-105559 attacked?
- It is attacked over the network, in an operating system.
- Am I affected by CVE-2026-105559?
- Check whether you run Microsoft Windows Active Directory. 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
A denial-of-service vulnerability in Windows Active Directory can be triggered by an authenticated network attacker sending specially crafted requests. The vulnerability allows the attacker to crash or hang the directory service, preventing legitimate authentication attempts. No fix is documented in the provided advisory details.
Affected products
- Microsoft Windows Active Directory
Timeline
- 2026-11-10: disclosed