--- title: "CVE-2026-94300: BIND 9 - Remote Code Execution" description: "BIND 9 versions 9.11.0 through 9.18.50, 9.20.0 through 9.20.29, 9.21.0 through 9.21.26, 9.11.3-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.29-S1 contain a remote code execution caused by replaying GSS-TSIG signed UDP messages leading to memory corruption in named, letting attackers execute code remotely, exploit requires valid negotiated TSIG key and crafted queries." url: https://panop.io/threat-heartbeat/CVE-2026-94300/ --- # CVE-2026-94300 BIND 9 - Remote Code Execution BIND 9 versions 9.11.0 through 9.18.50, 9.20.0 through 9.20.29, 9.21.0 through 9.21.26, 9.11.3-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.29-S1 contain a remote code execution caused by replaying GSS-TSIG signed UDP messages leading to memory corruption in named, letting attackers execute code remotely, exploit requires valid negotiated TSIG key and crafted queries. CVSS base score 8.1 /10 High CISA KEV Not listed Public exploit None known [View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-94300) ## Details Type Remote Code Execution Impact Remote Code Execution CVSS vector CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H Published 21 October 2026 Updated 22 October 2026 Weakness [CWE-362](https://cwe.mitre.org/data/definitions/362.html) ## Vendor fix Update to a version later than 9.21.26 or the latest available version. Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them. ## References - [https://nvd.nist.gov/vuln/detail/CVE-2026-94300](https://nvd.nist.gov/vuln/detail/CVE-2026-94300) - [https://downloads.isc.org/isc/bind9/9.20.30](https://downloads.isc.org/isc/bind9/9.20.30) - [https://downloads.isc.org/isc/bind9/9.21.27](https://downloads.isc.org/isc/bind9/9.21.27) - [https://kb.isc.org/docs/cve-2026-94300](https://kb.isc.org/docs/cve-2026-94300) [← All CVEs](https://panop.io/threat-heartbeat/) ## What this record can't tell you - Whether you run the affected software, and where - Whether an attacker can actually reach and exploit it - The misconfigurations that never get a CVE number - What it would cost the business, ranked into what to fix first Panop answers these inside your environment, for this CVE and every other finding. [Book a demo](https://panop.io/demo)