CVE-2026-57191 (GCVE-0-2026-57191)
Vulnerability from cvelistv5
Published
2026-10-27 21:32
Modified
2026-10-27 21:32
Severity ?
VLAI Severity ?
EPSS score ?
CWE
Summary
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.
References
Impacted products
| Vendor | Product | Version | |||||||
|---|---|---|---|---|---|---|---|---|---|
| asterisk | asterisk |
Version: < 20.20.1 Version: >= 21.0.0-pre1, < 21.12.3 Version: >= 22.0.0-pre1, < 22.10.1 Version: >= 23.0.0-pre1, < 23.4.1 |
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{
"containers": {
"cna": {
"affected": [
{
"product": "asterisk",
"vendor": "asterisk",
"versions": [
{
"status": "affected",
"version": "\u003c 20.20.1"
},
{
"status": "affected",
"version": "\u003e= 21.0.0-pre1, \u003c 21.12.3"
},
{
"status": "affected",
"version": "\u003e= 22.0.0-pre1, \u003c 22.10.1"
},
{
"status": "affected",
"version": "\u003e= 23.0.0-pre1, \u003c 23.4.1"
}
]
},
{
"product": "certified-asterisk",
"vendor": "asterisk",
"versions": [
{
"status": "affected",
"version": "\u003c 20.7-cert11"
},
{
"status": "affected",
"version": "\u003e= 22.8-cert1-pre1, \u003c 22.8-cert3"
}
]
}
],
"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."
}
],
"metrics": [
{
"cvssV4_0": {
"attackComplexity": "HIGH",
"attackRequirements": "NONE",
"attackVector": "NETWORK",
"baseScore": 8.2,
"baseSeverity": "HIGH",
"privilegesRequired": "NONE",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "NONE",
"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",
"version": "4.0",
"vulnAvailabilityImpact": "HIGH",
"vulnConfidentialityImpact": "NONE",
"vulnIntegrityImpact": "NONE"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-120",
"description": "CWE-120: Buffer Copy without Checking Size of Input (\u0027Classic Buffer Overflow\u0027)",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-787",
"description": "CWE-787: Out-of-bounds Write",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-10-27T21:32:23.714Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/asterisk/asterisk/security/advisories/GHSA-589g-qgf8-m6mx",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/asterisk/asterisk/security/advisories/GHSA-589g-qgf8-m6mx"
},
{
"name": "https://github.com/asterisk/asterisk/commit/0e89514084490070c5ecee419ec5ee37b7c49528",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/asterisk/asterisk/commit/0e89514084490070c5ecee419ec5ee37b7c49528"
},
{
"name": "https://github.com/asterisk/asterisk/commit/647b35c3cfd4a2cc3b1fb7560b085feba5c24b4b",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/asterisk/asterisk/commit/647b35c3cfd4a2cc3b1fb7560b085feba5c24b4b"
},
{
"name": "https://github.com/asterisk/asterisk/commit/7a1ffcdf38cc76d1c4eae51651667f3fd4548ab0",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/asterisk/asterisk/commit/7a1ffcdf38cc76d1c4eae51651667f3fd4548ab0"
},
{
"name": "https://github.com/asterisk/asterisk/commit/b4be3bd67ce4ac35b94fbfa860cdd9e1c906610b",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/asterisk/asterisk/commit/b4be3bd67ce4ac35b94fbfa860cdd9e1c906610b"
},
{
"name": "https://github.com/asterisk/asterisk/commit/b5281828dad7d44658439ba6393fe6be3328a4bd",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/asterisk/asterisk/commit/b5281828dad7d44658439ba6393fe6be3328a4bd"
},
{
"name": "https://github.com/asterisk/asterisk/commit/dca516f6d895e8867d48fa56b6ce7f05b6f7457a",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/asterisk/asterisk/commit/dca516f6d895e8867d48fa56b6ce7f05b6f7457a"
},
{
"name": "https://github.com/asterisk/asterisk/commit/ee1b66a5e40733ba0b9fad7fc4d032cabbe1dd75",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/asterisk/asterisk/commit/ee1b66a5e40733ba0b9fad7fc4d032cabbe1dd75"
},
{
"name": "https://github.com/asterisk/asterisk/releases/tag/20.20.1",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/asterisk/asterisk/releases/tag/20.20.1"
},
{
"name": "https://github.com/asterisk/asterisk/releases/tag/21.12.3",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/asterisk/asterisk/releases/tag/21.12.3"
},
{
"name": "https://github.com/asterisk/asterisk/releases/tag/22.10.1",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/asterisk/asterisk/releases/tag/22.10.1"
},
{
"name": "https://github.com/asterisk/asterisk/releases/tag/23.4.1",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/asterisk/asterisk/releases/tag/23.4.1"
},
{
"name": "https://github.com/asterisk/asterisk/releases/tag/certified-20.7-cert11",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/asterisk/asterisk/releases/tag/certified-20.7-cert11"
},
{
"name": "https://github.com/asterisk/asterisk/releases/tag/certified-22.8-cert3",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/asterisk/asterisk/releases/tag/certified-22.8-cert3"
},
{
"name": "https://github.com/asterisk/asterisk/tree/24.0.0-pre1",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/asterisk/asterisk/tree/24.0.0-pre1"
}
],
"source": {
"advisory": "GHSA-589g-qgf8-m6mx",
"discovery": "UNKNOWN"
},
"title": "Asterisk: Stack buffer overflow in MWI NOTIFY Message-Account parsing"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-57191",
"datePublished": "2026-10-27T21:32:23.714Z",
"dateReserved": "2026-06-24T02:00:46.799Z",
"dateUpdated": "2026-10-27T21:32:23.714Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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