CVE-2026-57191High· 8.2▾ TwilightAsterisk 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 `M…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 45.1 · likelihood 0 · exploitation 0
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Exploit-prediction probability, daily snapshots since Oct 28.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
0.6%
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.
asterisk < 20.20.1asterisk >= 21.0.0-pre1, < 21.12.3asterisk >= 22.0.0-pre1, < 22.10.1asterisk >= 23.0.0-pre1, < 23.4.1certified-asterisk < 20.7-cert11certified-asterisk >= 22.8-cert1-pre1, < 22.8-cert3Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
CVE-2026-57199Low· 2.3Asterisk: Asterisk app_sms.c copies externally controlled SMS lengths into fixed in-struct buffers
CVE-2026-57192Medium· 6.0Asterisk: Out-of-Bounds Write in Codec2 Decoder Due to Floor/Ceil Sample Count Mismatch
CVE-2026-57188High· 7.1Asterisk: Stack buffer overflow in res_xmpp XMPP namespace prefix handling
CVE-2026-57197High· 7.7Asterisk: Heap Buffer Overflow in OGG/Speex File Playback (format_ogg_speex)
CVE-2026-57194Medium· 5.9Asterisk: chan_unistim DIALPAGE digit handling can overflow phone_number and crash Asterisk
CVE-2026-57201High· 7.5Asterisk: Stack Buffer Overflow in H.323 ooTrace() via Unbounded vsprintf into Fixed 2048-byte Buffer