🔐 CVE Alert

CVE-2026-57191

UNKNOWN 0.0

Asterisk: Stack buffer overflow in MWI NOTIFY Message-Account parsing

CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th

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.

CWE CWE-120 CWE-787
Vendor asterisk
Product asterisk
Published Oct 27, 2026
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Affected Versions

asterisk / asterisk
< 20.20.1 >= 21.0.0-pre1, < 21.12.3 >= 22.0.0-pre1, < 22.10.1 >= 23.0.0-pre1, < 23.4.1
asterisk / certified-asterisk
< 20.7-cert11 >= 22.8-cert1-pre1, < 22.8-cert3

References

NVD ↗ CVE.org ↗ EPSS Data ↗
github.com: https://github.com/asterisk/asterisk/security/advisories/GHSA-589g-qgf8-m6mx github.com: https://github.com/asterisk/asterisk/commit/0e89514084490070c5ecee419ec5ee37b7c49528 github.com: https://github.com/asterisk/asterisk/commit/647b35c3cfd4a2cc3b1fb7560b085feba5c24b4b github.com: https://github.com/asterisk/asterisk/commit/7a1ffcdf38cc76d1c4eae51651667f3fd4548ab0 github.com: https://github.com/asterisk/asterisk/commit/b4be3bd67ce4ac35b94fbfa860cdd9e1c906610b github.com: https://github.com/asterisk/asterisk/commit/b5281828dad7d44658439ba6393fe6be3328a4bd github.com: https://github.com/asterisk/asterisk/commit/dca516f6d895e8867d48fa56b6ce7f05b6f7457a github.com: https://github.com/asterisk/asterisk/commit/ee1b66a5e40733ba0b9fad7fc4d032cabbe1dd75 github.com: https://github.com/asterisk/asterisk/releases/tag/20.20.1 github.com: https://github.com/asterisk/asterisk/releases/tag/21.12.3 github.com: https://github.com/asterisk/asterisk/releases/tag/22.10.1 github.com: https://github.com/asterisk/asterisk/releases/tag/23.4.1 github.com: https://github.com/asterisk/asterisk/releases/tag/certified-20.7-cert11 github.com: https://github.com/asterisk/asterisk/releases/tag/certified-22.8-cert3 github.com: https://github.com/asterisk/asterisk/tree/24.0.0-pre1