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CVE-2026-57195— Asterisk: NULL Pointer Dereference in HTTP AMI Digest Authentication

Quick assessment

Affected

asterisk asterisk

Exploitation

No confirmed in-the-wild exploitation; assess based on exposure

Recommended action

Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Asterisk 是一款开源的专用交换机（PBX）和电话系统工具包。在 Asterisk 20.20.1、21.12.3、22.10.1、23.4.1 以及认证版 Asterisk 20.7-cert11、22.8-cert3 之前的版本中，存在空指针解引用漏洞。当通过协议使用时，未认证的攻击者可能利用该漏洞导致 Asterisk 服务崩溃。触发此漏洞需同时满足以下条件：Asterisk 的 Web 服务器、功能，以及通过访问的功能必须全部启用；而这三项功能默认均为禁用状态。此外，攻击者必须能够连接到

CVSS 7.5 · High Updated Oct 28, 2026

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

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Vulnerability Information

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Vulnerability Title

Asterisk: NULL Pointer Dereference in HTTP AMI Digest Authentication

Source: CVE Program / CVE List V5

Vulnerability Description

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, a NULL pointer dereference in the `Asterisk Manager Interface (AMI)` may allow an unauthenticated attacker to crash Asterisk when `Digest Authentication` is used via `HTTP`. The Asterisk `HTTP` web server, AMI, and AMI access via `HTTP` must all be enabled; each is disabled by default. The attacker must be able to connect to the `HTTP` server, which binds only to `127.0.0.1` by default even when enabled. 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.

Source: CVE Program / CVE List V5

CVSS Information

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Source: CVE Program / CVE List V5

Vulnerability Type

空指针解引用

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
asterisk	asterisk	< 20.20.1	-
asterisk	certified-asterisk	< 20.7-cert11	-

II. Public POCs for CVE-2026-57195

#	POC Description	Source Link	Shenlong Link

AI-Generated POC Premium

No public POC found.

III. Intelligence Information for CVE-2026-57195

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Vendor Pages for CVE-2026-57195 (7)

🔗 GitHub - asterisk/asterisk at 24.0.0-pre1 · GitHub x_refsource_MISC
🔗 Release Asterisk Release 23.4.1 · asterisk/asterisk · GitHub x_refsource_MISC
🔗 Release Asterisk Release 21.12.3 · asterisk/asterisk · GitHub x_refsource_MISC
🔗 Release Asterisk Release 20.20.1 · asterisk/asterisk · GitHub Read full article x_refsource_MISC
🔗 Release Asterisk Release 22.10.1 · asterisk/asterisk · GitHub x_refsource_MISC
🔗 Release Asterisk Release certified-22.8-cert3 · asterisk/asterisk · GitHub x_refsource_MISC
🔗 Release Asterisk Release certified-20.7-cert11 · asterisk/asterisk · GitHub x_refsource_MISC

Other References for CVE-2026-57195 (8)

https://github.com/asterisk/asterisk/security/advisories/GHSA-3rhj-hhw7-m6fw x_refsource_CONFIRM
https://github.com/asterisk/asterisk/commit/abba42c58fee2226a709583afdbeec75cf1dde8b x_refsource_MISC
https://github.com/asterisk/asterisk/commit/5d5d8d8ef7f16774820b1889ae73d8d2ab14af45 x_refsource_MISC
https://github.com/asterisk/asterisk/commit/362ef847e7e057b7626e476ddcfe7328ea314db4 x_refsource_MISC
https://github.com/asterisk/asterisk/commit/87a1f43e4c465b885163665aa89172ed0f392663 x_refsource_MISC
https://github.com/asterisk/asterisk/commit/a1fcfdf9b91ed58cc8fb9da8d135da60bae7345d x_refsource_MISC
https://github.com/asterisk/asterisk/commit/10c5b2efcacab03bf04a229f81cc24e76fe42c41 x_refsource_MISC
https://github.com/asterisk/asterisk/commit/fff89162cdd702e8a143701f138edd8dceab154f x_refsource_MISC

https://www.cve.org/CVERecord?id=CVE-2026-57195

Same Patch Batch · asterisk · 2026-10-27 · 16 CVEs total

CVE-2026-57191	8.2 HIGH	Asterisk: Stack buffer overflow in MWI NOTIFY Message-Account parsing
CVE-2026-57202	8.1 HIGH	Asterisk: ARI setChannelVar bypasses live_dangerously and permits FILE() writes
CVE-2026-57197	7.7 HIGH	Asterisk: Heap Buffer Overflow in OGG/Speex File Playback (format_ogg_speex)
CVE-2026-57201	7.5 HIGH	Asterisk: Stack Buffer Overflow in H.323 ooTrace() via Unbounded vsprintf into Fixed 2048-
CVE-2026-57200	7.5 HIGH	Asterisk: ARI REST-over-WebSocket read-only bypass allows arbitrary module path load and c
CVE-2026-57186	7.5 HIGH	Asterisk: CVE-2022-37325 fix is absent from current chan_ooh323 Q.931 party-number parser
CVE-2026-57188	7.1 HIGH	Asterisk: Stack buffer overflow in res_xmpp XMPP namespace prefix handling
CVE-2026-57190	7.0 HIGH	Asterisk: SQL Injection in cel_pgsql and cel_tds via CELGenUserEvent eventtype Field
CVE-2026-57203	6.9 MEDIUM	Asterisk: Local privilege escalation through ast_loggrabber's world-writable helper locati
CVE-2026-57185	6.5 MEDIUM	Asterisk: Buffer over-read in Asterisk PJSIP MWI body parser
CVE-2026-57192	6.0 MEDIUM	Asterisk: Out-of-Bounds Write in Codec2 Decoder Due to Floor/Ceil Sample Count Mismatch
CVE-2026-57194	5.9 MEDIUM	Asterisk: chan_unistim DIALPAGE digit handling can overflow phone_number and crash Asteris
CVE-2026-57198	2.3 LOW	Asterisk: Possible RED T.140 Heap Buffer Overflow
CVE-2026-57189	2.3 LOW	Asterisk: Possible RED T.140 Generation Accumulation OOB Write
CVE-2026-57199	2.3 LOW	Asterisk: Asterisk app_sms.c copies externally controlled SMS lengths into fixed in-struct

IV. Related Vulnerabilities

Same product: asterisk

Same vendor: asterisk

Same weakness: CWE-476