Quick answers
- Is CVE-2026-88129 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-88129 being exploited in the wild.
- How severe is CVE-2026-88129?
- Medium severity, with a CVSS score of 6.5, published 13 October 2026.
- Which products and versions are affected?
- Microsoft DNS Server.
- Is there a fix for CVE-2026-88129?
- 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-2026-88129 attacked?
- It is attacked over the network, in a hosted service.
- Am I affected by CVE-2026-88129?
- Check whether you run Microsoft DNS Server, Microsoft Windows Server 2012, Microsoft Windows Server 2016 or one of the others listed. 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
An out-of-bounds read vulnerability in the DNS Server component allows an authenticated network attacker to trigger a denial of service condition. The vulnerability requires prior network access or authentication to the DNS service; exploitation causes the service to crash or become unresponsive, disrupting DNS resolution for affected networks. A fix is available from Microsoft.
Affected products
- Microsoft DNS Server
Timeline
- 2026-10-13: disclosed