CVE-2026-57193: Asterisk: LDAP Filter Injection in res_config_ldap via SIP Username (Unauthenticated Information Disclosure)
Affected: asterisk · Exploitation: possible (1 to 10%)
Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.
Higher than 80% of scored CVEs
DescriptionCVE.org
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.
Affected products2
From the CVE record. A product or version that is not listed is unknown, not unaffected.
- 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
- asterisk · certified-asterisk< 20.7-cert11; >= 22.8-cert1-pre1, < 22.8-cert3
On the Atlas
Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.
- Exploitation
- Possible (1 to 10%). EPSS between 1% and 10%.
- CISA KEV
- Not listed
- Public check
- No public nuclei template
- Vendor
- asterisk
- Published
- October 2026
CoverageNo articles yet
No CyberSIXT article names CVE-2026-57193 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.
References
- NVD entrynvd.nist.gov
- CVE recordcve.org
- Weakness CWE-943cwe.mitre.org
- github.com/asterisk/asterisk/security/advisories/GHSA-r6c2-hwc2-github.com
- github.com/asterisk/asterisk/commit/04aa482212e43b292817444eb4degithub.com
- github.com/asterisk/asterisk/commit/14968f2f440ea0dd983caa4f4772github.com
- github.com/asterisk/asterisk/commit/23c01b6d359c5d85da725beea89egithub.com
- github.com/asterisk/asterisk/commit/7e1ae09594a101950398cc6aff2dgithub.com
- github.com/asterisk/asterisk/commit/8170a6bfa75994e7617a8b9d7fe7github.com
- github.com/asterisk/asterisk/commit/dd0c768d9e9678e4cb1ed95689a2github.com
- github.com/asterisk/asterisk/commit/ef280572a034cac3994075298facgithub.com
- github.com/asterisk/asterisk/releases/tag/20.20.1github.com
- github.com/asterisk/asterisk/releases/tag/21.12.3github.com
- github.com/asterisk/asterisk/releases/tag/22.10.1github.com
- github.com/asterisk/asterisk/releases/tag/23.4.1github.com
3 more references are in the CVE record.