Improper Neutralization of Special Elements in Data Query Logic in Asterisk Open Source and Certified Asterisk - CVE-2026-57193
Published: June 26, 2026
Vulnerability identifier: #VU135534
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-57193
CWE-ID: CWE-943
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to disclose sensitive information.
The vulnerability exists due to improper neutralization of special elements in data query logic in the res_config_ldap realtime driver when processing crafted SIP packets containing a SIP username. A remote attacker can send specially crafted SIP packets to disclose sensitive information.
The issue is exposed only when the res_config_ldap module is loaded and configured to access an LDAP server.
Affected software
Asterisk Open Source
Certified Asterisk
Certified Asterisk
How to mitigate CVE-2026-57193
Install security update from vendor's website.
Asterisk Open Source - addressed in versions 20.20.1, 21.12.3, 22.10.1, 23.4.1
Certified Asterisk - addressed in versions 20.7-cert11, 22.8-cert3
Certified Asterisk - addressed in versions 20.7-cert11, 22.8-cert3