Quick answers
- Is CVE-2026-65789 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-65789 being exploited in the wild.
- How severe is CVE-2026-65789?
- High severity, with a CVSS score of 8.1, published 11 August 2026.
- Which products and versions are affected?
- Microsoft Windows DNS.
- Is there a fix for CVE-2026-65789?
- 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-2026-65789 attacked?
- It is attacked over the network.
- Am I affected by CVE-2026-65789?
- 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
A use-after-free vulnerability exists in the Windows DNS service, where memory is accessed after being freed, allowing attackers to corrupt the heap and achieve remote code execution. The vulnerability can be exploited over the network without authentication. An attacker can send specially crafted DNS requests to trigger the flaw and execute arbitrary code with DNS service privileges. The vulnerability affects Windows DNS components and requires a network attack vector. Microsoft has released patches via the Security Update Guide.
Affected products
- Microsoft Windows DNS
Timeline
- 2026-08-11: disclosed