{"id":"CVE-2026-57188","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-57188","generatedAt":"2026-10-28T03:31:43.452Z","title":"Prior to Asterisk 20.20.1, 21.12.3, 22.10.1, 23.4.1 and Certified Asterisk 20.7-cert11, 22.8-cert3, an authenticated attacker may cause a stack buffer overflow in `res_xmpp` `XMPP namespace prefix` handling using carefully crafted packets.","description":"Asterisk is an open source private branch exchange and telephony toolkit. Prior to Asterisk 20.20.1, 21.12.3, 22.10.1, 23.4.1 and Certified Asterisk 20.7-cert11, 22.8-cert3, an authenticated attacker may cause a stack buffer overflow in `res_xmpp` `XMPP namespace prefix` handling using carefully crafted packets. The `res_xmpp` module must be loaded, an XMPP connection must be configured in `xmpp.conf`, and the attacker must have an XMPP account on the same or a federated server. This issue is fixed in Asterisk 20.20.1, 21.12.3, 22.10.1, 23.4.1 and Certified Asterisk 20.7-cert11, 22.8-cert3.","published":"2026-10-27T18:17:37.000Z","lastModified":"2026-10-27T18:17:37.000Z","status":"Received","sourceIdentifier":"security-advisories@github.com","cvss":{"version":"4.0","score":7.1,"severity":"HIGH","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/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/M"},"cwe":["CWE-787"],"affected":[],"epss":null,"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unscored. Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[{"kind":"new","label":"New CVE","at":"2026-10-27T18:17:37.000Z","detail":{"score":"7.1","severity":"HIGH","publishedAt":"2026-10-27T18:17:37.367Z"},"summary":"New CVE, high severity (CVSS 7.1)."}],"references":[{"url":"https://github.com/asterisk/asterisk/commit/12072a559f592736a44dd9fbe1594e84714edfb4","source":"security-advisories@github.com"},{"url":"https://github.com/asterisk/asterisk/commit/1328dbb503da4aa11a480a9c28e170f17e5f4e84","source":"security-advisories@github.com"},{"url":"https://github.com/asterisk/asterisk/commit/3c4b08cf94eeaa3faefb3ae6c2d6ce1bd9747a13","source":"security-advisories@github.com"},{"url":"https://github.com/asterisk/asterisk/commit/433102c16b8edfc31d28c96166fef03fe72fb923","source":"security-advisories@github.com"},{"url":"https://github.com/asterisk/asterisk/commit/5e626250628b2579530f3f17e7b0aa37d082873b","source":"security-advisories@github.com"},{"url":"https://github.com/asterisk/asterisk/commit/d570a85e45153a36919ace5d0ab06a195b30f9d1","source":"security-advisories@github.com"},{"url":"https://github.com/asterisk/asterisk/commit/e329a6803ac5214028f98cc5f0b7167d66e32c08","source":"security-advisories@github.com"},{"url":"https://github.com/asterisk/asterisk/releases/tag/20.20.1","source":"security-advisories@github.com"},{"url":"https://github.com/asterisk/asterisk/releases/tag/21.12.3","source":"security-advisories@github.com"},{"url":"https://github.com/asterisk/asterisk/releases/tag/22.10.1","source":"security-advisories@github.com"},{"url":"https://github.com/asterisk/asterisk/releases/tag/23.4.1","source":"security-advisories@github.com"},{"url":"https://github.com/asterisk/asterisk/releases/tag/certified-20.7-cert11","source":"security-advisories@github.com"},{"url":"https://github.com/asterisk/asterisk/releases/tag/certified-22.8-cert3","source":"security-advisories@github.com"},{"url":"https://github.com/asterisk/asterisk/security/advisories/GHSA-mxgm-8c6f-5p8f","source":"security-advisories@github.com"},{"url":"https://github.com/asterisk/asterisk/tree/24.0.0-pre1","source":"security-advisories@github.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-57188","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}