Quick answers
- Is CVE-2026-69551 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-69551 being exploited in the wild.
- How severe is CVE-2026-69551?
- High severity, with a CVSS score of 8.8, published 8 September 2026.
- Which products and versions are affected?
- Microsoft Windows DNS Server.
- Is there a fix for CVE-2026-69551?
- 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-2026-69551 attacked?
- It is attacked over the network.
- Am I affected by CVE-2026-69551?
- Check whether you run Microsoft Windows DNS Server. 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
This vulnerability is a use-after-free memory safety issue in the Windows DNS service. The flaw allows an authenticated attacker with network access to trigger code execution through specially crafted DNS requests or operations. The vulnerability requires the attacker to be authorized (authenticated) to the DNS service, limiting the immediate blast radius. Successful exploitation can lead to remote code execution with DNS service privileges. A patch is available from Microsoft's Security Response Center.
Affected products
- Microsoft Windows DNS Server
Timeline
- 2026-09-08: disclosed