CVE-2026-57195
Asterisk: NULL Pointer Dereference in HTTP AMI Digest Authentication
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.
INFO
Published Date :
Oct. 27, 2026, 9:18 p.m.
Last Modified :
Oct. 27, 2026, 9:18 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | [email protected] |
Solution
- Update Asterisk to a fixed version.
- Ensure AMI and HTTP server are disabled.
- Restrict HTTP server access to localhost.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-57195.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-57195 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-57195
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-57195 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-57195 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
New CVE Received by [email protected]
Oct. 27, 2026
Action Type Old Value New Value Added 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. Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Added CWE CWE-476 Added Affected New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/57xxx/CVE-2026-57195.json">CVE-2026-57195</a> Added Reference https://github.com/asterisk/asterisk/commit/10c5b2efcacab03bf04a229f81cc24e76fe42c41 Added Reference https://github.com/asterisk/asterisk/commit/362ef847e7e057b7626e476ddcfe7328ea314db4 Added Reference https://github.com/asterisk/asterisk/commit/5d5d8d8ef7f16774820b1889ae73d8d2ab14af45 Added Reference https://github.com/asterisk/asterisk/commit/87a1f43e4c465b885163665aa89172ed0f392663 Added Reference https://github.com/asterisk/asterisk/commit/a1fcfdf9b91ed58cc8fb9da8d135da60bae7345d Added Reference https://github.com/asterisk/asterisk/commit/abba42c58fee2226a709583afdbeec75cf1dde8b Added Reference https://github.com/asterisk/asterisk/commit/fff89162cdd702e8a143701f138edd8dceab154f Added Reference https://github.com/asterisk/asterisk/releases/tag/20.20.1 Added Reference https://github.com/asterisk/asterisk/releases/tag/21.12.3 Added Reference https://github.com/asterisk/asterisk/releases/tag/22.10.1 Added Reference https://github.com/asterisk/asterisk/releases/tag/23.4.1 Added Reference https://github.com/asterisk/asterisk/releases/tag/certified-20.7-cert11 Added Reference https://github.com/asterisk/asterisk/releases/tag/certified-22.8-cert3 Added Reference https://github.com/asterisk/asterisk/security/advisories/GHSA-3rhj-hhw7-m6fw Added Reference https://github.com/asterisk/asterisk/tree/24.0.0-pre1