7.5
HighCVSS 3.1 · from GitHub_M
CVE-2026-57195
Asterisk: NULL Pointer Dereference in HTTP AMI Digest Authentication
asterisk · NULL pointer dereference · CWE-476Affectedasterisk, certified-asterisk
FixNo fix listed yet.
PublishedOct 27, 21:04 · GitHub_M
ScoredOct 27 · 7.5 · GitHub_M
Exploit code publicNone known · checked 21:18 UTC
ExploitedNone known · CISA KEV checked 22:06 UTC
What we know
No known exploitation. CISA KEV, checked 22:06 UTC.
No public exploit code known. Exploit-DB, Metasploit, Nuclei, checked 21:18 UTC.
An attacker only needs network access to the target. No login needed. CVSS: network, no privileges.
A successful attack can take the service down. CVSS impact.
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.
From GitHub_M
Affected and fixed versions
ProductAffectedFixed inasterisk< 20.20.1–asterisk>= 21.0.0-pre1, < 21.12.3–asterisk>= 22.0.0-pre1, < 22.10.1–asterisk>= 23.0.0-pre1, < 23.4.1–certified-asterisk< 20.7-cert11–certified-asterisk>= 22.8-cert1-pre1, < 22.8-cert3–
Exploit code
Exploit-DBnone knownMetasploitnone knownNucleinone known