Is CVE-2026-57193 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-57193 being exploited in the wild.

How severe is CVE-2026-57193?

Informational severity, published 26 October 2026.

Which products and versions are affected?

Asterisk prior to 20.20.1, 21.12.3, 22.10.1, 23.4.1; Asterisk Certified Asterisk prior to 20.7-cert11, 22.8-cert3.

Is there a fix for CVE-2026-57193?

Yes: fixed in Asterisk 20.20.1, 21.12.3, 22.10.1, 23.4.1; Certified Asterisk 20.7-cert11, 22.8-cert3. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-57193 attacked?

It is attacked over the network, in a hosted service.

Am I affected by CVE-2026-57193?

Check whether you run Asterisk or Asterisk Certified Asterisk at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-57193: Asterisk LDAP filter injection in SIP username

CVE-2026-57193 · Severity: info · Published 2026-10-26

Asterisk is an open source phone system and call handling toolkit. When configured to use LDAP for user lookup (a non-default setting), an attacker can craft specially formatted SIP calls that inject LDAP filter commands, allowing them to query the LDAP directory and extract sensitive information without authentication.

Technologies: Asterisk, Asterisk Certified Asterisk. Vendors: Asterisk.

Quick answers

Is CVE-2026-57193 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-57193 being exploited in the wild.
How severe is CVE-2026-57193?: Informational severity, published 26 October 2026.
Which products and versions are affected?: Asterisk prior to 20.20.1, 21.12.3, 22.10.1, 23.4.1; Asterisk Certified Asterisk prior to 20.7-cert11, 22.8-cert3.
Is there a fix for CVE-2026-57193?: Yes: fixed in Asterisk 20.20.1, 21.12.3, 22.10.1, 23.4.1; Certified Asterisk 20.7-cert11, 22.8-cert3. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-57193 attacked?: It is attacked over the network, in a hosted service.
Am I affected by CVE-2026-57193?: Check whether you run Asterisk or Asterisk Certified Asterisk at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

Fixed in: Asterisk 20.20.1, 21.12.3, 22.10.1, 23.4.1; Certified Asterisk 20.7-cert11, 22.8-cert3

Technical details

The LDAP realtime driver (res_config_ldap) concatenates user-supplied SIP From header usernames directly into LDAP filter queries without escaping RFC 4515 special characters (*, (, ), \). An unauthenticated attacker can send crafted SIP packets with LDAP filter metacharacters in the username to execute arbitrary LDAP queries. The vulnerability requires LDAP realtime backend configuration and the res_config_ldap module to be loaded.

Affected products

Asterisk Asterisk prior to 20.20.1, 21.12.3, 22.10.1, 23.4.1
Asterisk Certified Asterisk prior to 20.7-cert11, 22.8-cert3

Timeline

2026-10-26: disclosed

References

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