CVE-2026-57195 Asterisk: NULL Pointer Dereference in HTTP AMI Digest Authentication
- Exploited in the wild
- Not known
- Fix
- Available
What is CVE-2026-57195?
CVE-2026-57195 is a high-severity vulnerability in asterisk, published on 27 Oct 2026.
Official 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.
Weakness: CWE-476
Which versions are affected by CVE-2026-57195?
How do I fix CVE-2026-57195?
Upgrade to a fixed version.
Is CVE-2026-57195 being exploited?
There is no known exploitation of CVE-2026-57195 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-57195, GHSA-3rhj-hhw7-m6fw, UBUNTU-CVE-2026-57195.