--- title: "CVE-2026-57195: Asterisk - Denial of Service" description: "Asterisk < 20.20.1, 21.12.3, 22.10.1, 23.4.1 and Certified Asterisk < 20.7-cert11, 22.8-cert3 contain a null pointer dereference caused by improper handling in Asterisk Manager Interface (AMI) with Digest Authentication over HTTP, letting unauthenticated attackers crash the system, exploit requires HTTP server, AMI, and AMI HTTP access enabled." url: https://panop.io/threat-heartbeat/CVE-2026-57195/ --- # CVE-2026-57195 Asterisk - Denial of Service Asterisk < 20.20.1, 21.12.3, 22.10.1, 23.4.1 and Certified Asterisk < 20.7-cert11, 22.8-cert3 contain a null pointer dereference caused by improper handling in Asterisk Manager Interface (AMI) with Digest Authentication over HTTP, letting unauthenticated attackers crash the system, exploit requires HTTP server, AMI, and AMI HTTP access enabled. CVSS base score 7.5 /10 High CISA KEV Not listed Public exploit None known EPSS 0.57% chance of exploitation in 30 days [View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-57195) ## Details Type Denial of Service Impact Denial Of Service CVSS vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Published 27 October 2026 Updated 29 October 2026 Weakness [CWE-476](https://cwe.mitre.org/data/definitions/476.html) ## Vendor fix Update to versions 20.20.1, 21.12.3, 22.10.1, 23.4.1 or Certified Asterisk 20.7-cert11, 22.8-cert3 or later. 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-2026-57195](https://nvd.nist.gov/vuln/detail/CVE-2026-57195) - [https://github.com/asterisk/asterisk/commit/a1fcfdf9b91ed58cc8fb9da8d135da60bae7345d](https://github.com/asterisk/asterisk/commit/a1fcfdf9b91ed58cc8fb9da8d135da60bae7345d) - [https://github.com/asterisk/asterisk/commit/abba42c58fee2226a709583afdbeec75cf1dde8b](https://github.com/asterisk/asterisk/commit/abba42c58fee2226a709583afdbeec75cf1dde8b) - [https://github.com/asterisk/asterisk/releases/tag/20.20.1](https://github.com/asterisk/asterisk/releases/tag/20.20.1) - [https://github.com/asterisk/asterisk/releases/tag/22.10.1](https://github.com/asterisk/asterisk/releases/tag/22.10.1) - [https://github.com/asterisk/asterisk/releases/tag/23.4.1](https://github.com/asterisk/asterisk/releases/tag/23.4.1) - [https://github.com/asterisk/asterisk/commit/5d5d8d8ef7f16774820b1889ae73d8d2ab14af45](https://github.com/asterisk/asterisk/commit/5d5d8d8ef7f16774820b1889ae73d8d2ab14af45) - [https://github.com/asterisk/asterisk/tree/24.0.0-pre1](https://github.com/asterisk/asterisk/tree/24.0.0-pre1) - [https://github.com/asterisk/asterisk/commit/10c5b2efcacab03bf04a229f81cc24e76fe42c41](https://github.com/asterisk/asterisk/commit/10c5b2efcacab03bf04a229f81cc24e76fe42c41) - [https://github.com/asterisk/asterisk/releases/tag/certified-22.8-cert3](https://github.com/asterisk/asterisk/releases/tag/certified-22.8-cert3) - [https://github.com/asterisk/asterisk/security/advisories/GHSA-3rhj-hhw7-m6fw](https://github.com/asterisk/asterisk/security/advisories/GHSA-3rhj-hhw7-m6fw) - [https://github.com/asterisk/asterisk/commit/362ef847e7e057b7626e476ddcfe7328ea314db4](https://github.com/asterisk/asterisk/commit/362ef847e7e057b7626e476ddcfe7328ea314db4) - [https://github.com/asterisk/asterisk/commit/87a1f43e4c465b885163665aa89172ed0f392663](https://github.com/asterisk/asterisk/commit/87a1f43e4c465b885163665aa89172ed0f392663) - [https://github.com/asterisk/asterisk/commit/fff89162cdd702e8a143701f138edd8dceab154f](https://github.com/asterisk/asterisk/commit/fff89162cdd702e8a143701f138edd8dceab154f) - [https://github.com/asterisk/asterisk/releases/tag/21.12.3](https://github.com/asterisk/asterisk/releases/tag/21.12.3) - [https://github.com/asterisk/asterisk/releases/tag/certified-20.7-cert11](https://github.com/asterisk/asterisk/releases/tag/certified-20.7-cert11) [← 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)