CVE-2026-57193
Asterisk: LDAP Filter Injection in res_config_ldap via SIP Username (Unauthenticated Information Disclosure)
- Published
- Updated
- Reserved
- Assigned by
- GitHub_M
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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| GitHub_MCNA (assigner) | 4.0 | Medium6.9 | 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 |
| NVDNVD · Undergoing Analysis | 4.0 | Medium6.9 | 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
- EPSS (exploitation in 30 days)
- 2.0% · top 20% of all CVEs (6 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: yes · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.9.
Weakness
Affected products
- affected < 20.20.1
- affected >= 21.0.0-pre1, < 21.12.3
- affected >= 22.0.0-pre1, < 22.10.1
- affected >= 23.0.0-pre1, < 23.4.1
- affected < 20.7-cert11
- affected >= 22.8-cert1-pre1, < 22.8-cert3
References (15)
- https://github.com/asterisk/asterisk/security/advisories/GHSA-r6c2-hwc2-j4mp (opens in a new tab)x_refsource_CONFIRM
- https://github.com/asterisk/asterisk/commit/04aa482212e43b292817444eb4de35499f4b1568 (opens in a new tab)x_refsource_MISC
- https://github.com/asterisk/asterisk/commit/14968f2f440ea0dd983caa4f477237a5224904dd (opens in a new tab)x_refsource_MISC
- https://github.com/asterisk/asterisk/commit/23c01b6d359c5d85da725beea89e394a6c031c5d (opens in a new tab)x_refsource_MISC
- https://github.com/asterisk/asterisk/commit/7e1ae09594a101950398cc6aff2dd2e5ab314884 (opens in a new tab)x_refsource_MISC
- https://github.com/asterisk/asterisk/commit/8170a6bfa75994e7617a8b9d7fe7a7140b70cbe2 (opens in a new tab)x_refsource_MISC
- https://github.com/asterisk/asterisk/commit/dd0c768d9e9678e4cb1ed95689a254a61452239b (opens in a new tab)x_refsource_MISC
- https://github.com/asterisk/asterisk/commit/ef280572a034cac3994075298facb1999778ee0d (opens in a new tab)x_refsource_MISC
- https://github.com/asterisk/asterisk/releases/tag/20.20.1 (opens in a new tab)x_refsource_MISC
- https://github.com/asterisk/asterisk/releases/tag/21.12.3 (opens in a new tab)x_refsource_MISC
- https://github.com/asterisk/asterisk/releases/tag/22.10.1 (opens in a new tab)x_refsource_MISC
- https://github.com/asterisk/asterisk/releases/tag/23.4.1 (opens in a new tab)x_refsource_MISC
- https://github.com/asterisk/asterisk/releases/tag/certified-20.7-cert11 (opens in a new tab)x_refsource_MISC
- https://github.com/asterisk/asterisk/releases/tag/certified-22.8-cert3 (opens in a new tab)x_refsource_MISC
- https://github.com/asterisk/asterisk/tree/24.0.0-pre1 (opens in a new tab)x_refsource_MISC
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2026-57193)Record last updated .