CVE Watch2 de nov. de 2026

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

CVSS

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Sem CVSS

EPSS

0.6%

p49

KEV

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Exploit Today

0-100

Publicado: 27 de out. de 2026 · Última mod.: 2 de nov. de 2026 · CWE-120 · CWE-787

EPSS · 30d

0.6%EPSS · 30 dias0.6%

2026-10-282026-11-07

Descrição técnica

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.

Referências oficiais

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