CVE-2026-57191

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 respjsippubsub when parsing the MWI NOTIFY Message-Account field may allow an unauthenticated attack...

CVE-2026-57191 Asterisk: Stack buffer overflow in MWI NOTIFY Message-Account parsing

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 respjsippubsub when parsing the MWI NOTIFY Message-Account field may allow an unauthenticated attack...

EUVD-2026-111397

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 respjsippubsub when parsing the MWI NOTIFY Message-Account field may allow an unauthenticated attack...

CVE-2026-57191

Asterisk is vulnerable to a stack buffer overflow in res_pjsip_pubsub.c due to an unbounded sscanf with %s conversion. An unauthenticated attacker can send a crafted SIP NOTIFY packet with an oversized message-summary body field, triggering a 901-byte out-of-bounds write that corrupts the stack m...