# CVE-2026-96064: DNS Server heap-based buffer overflow

Source: https://junglewise.ai/threats/cve-2026-96064-heap-based-buffer-overflow-in-dns-server-allows-an-authorized  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-11-10. Updated: 2026-11-10  
License: CC BY 4.0 with a link back

CVE-2026-96064 · Severity: high · CVSS 8.8 · Published 2026-11-10

A DNS server implementation contains a heap-based buffer overflow vulnerability that allows an authorized attacker to execute arbitrary code remotely. An attacker with valid credentials could exploit this to gain complete control over the DNS server and potentially compromise network infrastructure that depends on it.

Technologies: [DNS Server](https://junglewise.ai/threats/technologies/x-dns-server).

## Quick answers

**Is CVE-2026-96064 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-96064 being exploited in the wild.

**How severe is CVE-2026-96064?** High severity, with a CVSS score of 8.8, published 10 November 2026.

**Which products and versions are affected?** DNS Server.

**Is there a fix for CVE-2026-96064?** 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-2026-96064 attacked?** It is attacked over the network, in a hosted service.

**Am I affected by CVE-2026-96064?** Check whether you run 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

A heap-based buffer overflow exists in the DNS Server component, allowing an authenticated network attacker to achieve remote code execution. The vulnerability requires valid authentication credentials and network access to the DNS service. Exploitation could lead to full compromise of the affected server.

## Affected products

- DNS Server

## Timeline

- 2026-11-10: disclosed

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-96064](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-96064)

## Related threats

- [DNS Server heap-based buffer overflow](https://junglewise.ai/threats/cve-2026-96002-heap-based-buffer-overflow-in-dns-server-allows-an-authorized)
- [DNS Server out-of-bounds read information disclosure](https://junglewise.ai/threats/cve-2026-97833-out-of-bounds-read-in-dns-server-allows-an-authorized-attacker-to)
- [DNS Server buffer over-read information disclosure](https://junglewise.ai/threats/cve-2026-97828-buffer-over-read-in-dns-server-allows-an-authorized-attacker-to)
- [DNS Server out-of-bounds read information disclosure](https://junglewise.ai/threats/cve-2026-97826-out-of-bounds-read-in-dns-server-allows-an-authorized-attacker-to)
- [DNS Server out-of-bounds read information disclosure](https://junglewise.ai/threats/cve-2026-97823-out-of-bounds-read-in-dns-server-allows-an-authorized-attacker-to)