CVE-2026-57202
Published:October 27, 2026
Updated:October 28, 2026
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, an authenticated Asterisk REST Interface (ARI) attacker with read-only privileges may use "setChannelVar" to execute write dialplan functions, including "FILE()" writes, even when "live_dangerously" in "asterisk.conf" is set to no. 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 20.7-cert11, 22.8-cert3.
Affected Packages
https://github.com/asterisk/asterisk.git (GITHUB):
Affected version(s) >=22.0.0-rc1 <22.10.1Fix Suggestion:
Update to version 22.10.1https://github.com/asterisk/asterisk.git (GITHUB):
Affected version(s) >=21.0.0-rc1 <21.12.3Fix Suggestion:
Update to version 21.12.3https://github.com/asterisk/asterisk.git (GITHUB):
Affected version(s) >=20.0.0-rc1 <20.20.1Fix Suggestion:
Update to version 20.20.1https://github.com/asterisk/asterisk.git (GITHUB):
Affected version(s) >=certified-22.8-cert1-rc1 <certified-22.8-cert3Fix Suggestion:
Update to version certified-22.8-cert3https://github.com/asterisk/asterisk.git (GITHUB):
Affected version(s) >=certified-20.7-cert1-rc1 <certified-20.7-cert11Fix Suggestion:
Update to version certified-20.7-cert11https://github.com/asterisk/asterisk.git (GITHUB):
Affected version(s) >=23.0.0-rc1 <23.4.1Fix Suggestion:
Update to version 23.4.1Related Resources (15)
Do you need more information?
Contact UsCVSS v4
Base Score:
8.6
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
8.1
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
NONE