# CVE-2026-81384: DNS Server heap buffer overflow allows remote code execution

Source: https://junglewise.ai/threats/cve-2026-81384-heap-based-buffer-overflow-in-dns-server-allows-an-unauthorized  
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-2026-81384 · Severity: high · CVSS 8.1 · Published 2026-11-10

A DNS server contains a heap buffer overflow vulnerability that allows an attacker on the network to execute arbitrary code with high privilege. This could lead to complete compromise of the DNS infrastructure, enabling attackers to redirect traffic, inject malware, or launch further attacks against systems relying on DNS resolution.

Vendors: [Unknown](https://junglewise.ai/threats/vendors/unknown).

## Quick answers

**Is CVE-2026-81384 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-81384 being exploited in the wild.

**How severe is CVE-2026-81384?** High severity, with a CVSS score of 8.1, published 10 November 2026.

**Which products and versions are affected?** <UNKNOWN> DNS Server.

**Is there a fix for CVE-2026-81384?** 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-2026-81384 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-81384?** Check whether you run Unknown 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 in DNS Server processing allows an unauthenticated attacker to trigger memory corruption and achieve remote code execution via the network. The vulnerability requires only network connectivity to the DNS service; no authentication or user interaction is required. Exploitation results in arbitrary code execution in the context of the DNS service.

## Affected products

- <UNKNOWN> DNS Server

## Timeline

- 2026-11-10: disclosed

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-81384](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-81384)