--- title: "CVE-2026-57197: Asterisk - Buffer Overflow" 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 heap buffer overflow caused by unbounded memcpy of OGG/Speex packet data in format_ogg_speex, letting attackers crash the system by providing corrupted Speex audio files, exploit requires attacker to create and make the file available with elevated privileges or convince an administrator." url: https://panop.io/threat-heartbeat/CVE-2026-57197/ --- # CVE-2026-57197 Asterisk - Buffer Overflow Asterisk < 20.20.1, 21.12.3, 22.10.1, 23.4.1 and Certified Asterisk < 20.7-cert11, 22.8-cert3 contain a heap buffer overflow caused by unbounded memcpy of OGG/Speex packet data in format\_ogg\_speex, letting attackers crash the system by providing corrupted Speex audio files, exploit requires attacker to create and make the file available with elevated privileges or convince an administrator. CVSS base score 7.7 /10 High CISA KEV Not listed Public exploit None known Authentication Required EPSS 0.53% chance of exploitation in 30 days [View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-57197) ## Details Type Buffer Overflow Impact Denial Of Service CVSS vector CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Published 27 October 2026 Updated 29 October 2026 Weakness [CWE-122](https://cwe.mitre.org/data/definitions/122.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-2026-57197](https://nvd.nist.gov/vuln/detail/CVE-2026-57197) - [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/certified-20.7-cert11](https://github.com/asterisk/asterisk/releases/tag/certified-20.7-cert11) - [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/29026ece6fdd1834bb8f49c013ef163745ff2bbd](https://github.com/asterisk/asterisk/commit/29026ece6fdd1834bb8f49c013ef163745ff2bbd) - [https://github.com/asterisk/asterisk/commit/336ebe762bf6dfaf279796700de8ab51f7acd2f3](https://github.com/asterisk/asterisk/commit/336ebe762bf6dfaf279796700de8ab51f7acd2f3) - [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/23.4.1](https://github.com/asterisk/asterisk/releases/tag/23.4.1) - [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/commit/0e6d761ed83f1671632c91805252767eae85e1a2](https://github.com/asterisk/asterisk/commit/0e6d761ed83f1671632c91805252767eae85e1a2) - [https://github.com/asterisk/asterisk/commit/0a2c1d9e910f7c4dfffa05e328accb8a96990df8](https://github.com/asterisk/asterisk/commit/0a2c1d9e910f7c4dfffa05e328accb8a96990df8) - [https://github.com/asterisk/asterisk/commit/1cf189549994e0898954c814ce5a023cd969f1db](https://github.com/asterisk/asterisk/commit/1cf189549994e0898954c814ce5a023cd969f1db) - [https://github.com/asterisk/asterisk/commit/ccec146953b5e13043a36663af84e5a50ca633a6](https://github.com/asterisk/asterisk/commit/ccec146953b5e13043a36663af84e5a50ca633a6) - [https://github.com/asterisk/asterisk/commit/dbcf38933866f0ddd023bc1814a78d4c750b0809](https://github.com/asterisk/asterisk/commit/dbcf38933866f0ddd023bc1814a78d4c750b0809) - [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/security/advisories/GHSA-8jhw-m2hg-vp3h](https://github.com/asterisk/asterisk/security/advisories/GHSA-8jhw-m2hg-vp3h) [← 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)