Vulnerability 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, the LDAP realtime driver `res_config_ldap` may permit `LDAP filter injection` through a `SIP username`, allowing an unauthenticated attacker to make arbitrary LDAP queries using carefully crafted SIP packets and disclose information. The `res_config_ldap` module must be loaded and configured to access an LDAP server, which is not the default. 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.
Related Weaknesses (CWE)
References
- https://github.com/asterisk/asterisk/commit/04aa482212e43b292817444eb4de35499f4b
- https://github.com/asterisk/asterisk/commit/14968f2f440ea0dd983caa4f477237a52249
- https://github.com/asterisk/asterisk/commit/23c01b6d359c5d85da725beea89e394a6c03
- https://github.com/asterisk/asterisk/commit/7e1ae09594a101950398cc6aff2dd2e5ab31
- https://github.com/asterisk/asterisk/commit/8170a6bfa75994e7617a8b9d7fe7a7140b70
- https://github.com/asterisk/asterisk/commit/dd0c768d9e9678e4cb1ed95689a254a61452
- https://github.com/asterisk/asterisk/commit/ef280572a034cac3994075298facb1999778
- https://github.com/asterisk/asterisk/releases/tag/20.20.1
- https://github.com/asterisk/asterisk/releases/tag/21.12.3
- https://github.com/asterisk/asterisk/releases/tag/22.10.1
- https://github.com/asterisk/asterisk/releases/tag/23.4.1
- https://github.com/asterisk/asterisk/releases/tag/certified-20.7-cert11
- https://github.com/asterisk/asterisk/releases/tag/certified-22.8-cert3
- https://github.com/asterisk/asterisk/security/advisories/GHSA-r6c2-hwc2-j4mp
- https://github.com/asterisk/asterisk/tree/24.0.0-pre1
FAQ
What is CVE-2026-57193?
CVE-2026-57193 is a documented vulnerability. 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, the LDAP realtime driver `...
How severe is CVE-2026-57193?
CVSS scoring is not yet available for CVE-2026-57193. Check NVD for updates.
Is there a patch for CVE-2026-57193?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.