High severity · published Oct 27, 2026
CVE-2026-57200
Asterisk: ARI REST-over-WebSocket read-only bypass allows arbitrary module path load and conditional RCE
New
7.5
CVSS
0.9%
EPSS
No
On KEV
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 22.8-cert3, an authenticated attacker with read-only permissions for the `Asterisk REST Interface (ARI)` may, under certain conditions, execute write operations through `REST-over-WebSocket`. The authorization bypass permits `arbitrary module path` loading and conditional remote code execution. The Asterisk HTTP web server must be enabled and reachable, and the attacker must already have valid `read-only ARI credentials`. HTTP is disabled by default and 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 22.8-cert3.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
High
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.9% · higher than 59% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AS
asterisk · asterisk
< 20.20.1; >= 21.0.0-pre1, < 21.12.3; >= 22.0.0-pre1, < 22.10.1; >= 23.0.0-pre1, < 23.4.1 · source: vendor
CE
certified-asterisk · certified-asterisk
>= 22.8-cert1-pre1, < 22.8-cert3 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-57200
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-57200
github.com
https://github.com/asterisk/asterisk/commit/051d29a0d35559e9165bab346de9422e25415533
github.com
https://github.com/asterisk/asterisk/commit/205c301a0a0b0d013d4ebdf12856ebbc30405350
github.com
https://github.com/asterisk/asterisk/commit/762b4c9c39b28fa5564112b0f484012298469a6c
github.com
https://github.com/asterisk/asterisk/commit/87641e9b2cd62c998c5283400ba77b61b5b07dd4
github.com
https://github.com/asterisk/asterisk/commit/9d198a7d16ccba51507dfea6c1ecc511e89d698a
github.com
https://github.com/asterisk/asterisk/commit/c10cdbce072a708060cd38a89d6850808fe6bf46
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