CVE-2026-57191

{"id": "CVE-2026-57191", "cveTags": [], "metrics": {"cvssMetricV40": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 8.2, "Automatable": "NOT_DEFINED", "attackVector": "NETWORK", "baseSeverity": "HIGH", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:H/AT:N/PR:N/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/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "exploitMaturity": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "userInteraction": "NONE", "attackComplexity": "HIGH", "attackRequirements": "NONE", "privilegesRequired": "NONE", "subIntegrityImpact": "NONE", "vulnIntegrityImpact": "NONE", "integrityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "availabilityRequirement": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "NONE", "confidentialityRequirement": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED"}}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "asterisk", "product": "asterisk", "versions": [{"status": "affected", "version": "< 20.20.1"}, {"status": "affected", "version": ">= 21.0.0-pre1, < 21.12.3"}, {"status": "affected", "version": ">= 22.0.0-pre1, < 22.10.1"}, {"status": "affected", "version": ">= 23.0.0-pre1, < 23.4.1"}]}, {"vendor": "asterisk", "product": "certified-asterisk", "versions": [{"status": "affected", "version": "< 20.7-cert11"}, {"status": "affected", "version": ">= 22.8-cert1-pre1, < 22.8-cert3"}]}]}], "published": "2026-10-27T22:17:27.390", "references": [{"url": "https://github.com/asterisk/asterisk/commit/0e89514084490070c5ecee419ec5ee37b7c49528", "source": "security-advisories@github.com"}, {"url": "https://github.com/asterisk/asterisk/commit/647b35c3cfd4a2cc3b1fb7560b085feba5c24b4b", "source": "security-advisories@github.com"}, {"url": "https://github.com/asterisk/asterisk/commit/7a1ffcdf38cc76d1c4eae51651667f3fd4548ab0", "source": "security-advisories@github.com"}, {"url": "https://github.com/asterisk/asterisk/commit/b4be3bd67ce4ac35b94fbfa860cdd9e1c906610b", "source": "security-advisories@github.com"}, {"url": "https://github.com/asterisk/asterisk/commit/b5281828dad7d44658439ba6393fe6be3328a4bd", "source": "security-advisories@github.com"}, {"url": "https://github.com/asterisk/asterisk/commit/dca516f6d895e8867d48fa56b6ce7f05b6f7457a", "source": "security-advisories@github.com"}, {"url": "https://github.com/asterisk/asterisk/commit/ee1b66a5e40733ba0b9fad7fc4d032cabbe1dd75", "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-589g-qgf8-m6mx", "source": "security-advisories@github.com"}, {"url": "https://github.com/asterisk/asterisk/tree/24.0.0-pre1", "source": "security-advisories@github.com"}], "vulnStatus": "Awaiting Analysis", "weaknesses": [{"type": "Primary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-120"}, {"lang": "en", "value": "CWE-787"}]}], "descriptions": [{"lang": "en", "value": "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 unbounded `sscanf` in `res_pjsip_pubsub` when parsing the `MWI NOTIFY` `Message-Account` field may allow an unauthenticated attacker to send a carefully crafted packet that causes a stack buffer overflow and corrupts the underlying transport, permanently disabling all SIP functionality. An Asterisk restart is required to restore full operation. 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."}], "lastModified": "2026-10-28T14:18:37.620", "sourceIdentifier": "security-advisories@github.com"}