CVE-2026-57193

MediumCVSS 6.9/10Last modified Oct 31, 2026

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.

Metrics

CVSS 4.0 6.9/10CVSS: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

Weakness enumeration

CWE-943

Affected software

Source: the vendor's advisory (CNA). NVD analysis pending.

VendorProductVersions
asteriskasterisk< 20.20.1; >= 21.0.0-pre1, < 21.12.3; >= 22.0.0-pre1, < 22.10.1; >= 23.0.0-pre1, < 23.4.1
asteriskcertified-asterisk< 20.7-cert11; >= 22.8-cert1-pre1, < 22.8-cert3

References

Timeline

Published
Oct 26, 2026
Last modified
Oct 31, 2026
NVD status
Undergoing Analysis

Related CVEs from 2026

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CVE-2026-57193: Medium severity, CVSS 6.9 | Vulnix