Is CVE-2026-57203 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-57203 being exploited in the wild.

How severe is CVE-2026-57203?

Informational severity, published 27 October 2026.

Which products and versions are affected?

Asterisk before 20.20.1, 21.x before 21.12.3, 22.x before 22.10.1, 23.x before 23.4.1; Asterisk Certified Asterisk 20.7 before 20.7-cert11, 22.8 before 22.8-cert3.

Is there a fix for CVE-2026-57203?

Yes: fixed in Asterisk 20.20.1, 21.12.3, 22.10.1, 23.4.1 and 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-2026-57203 attacked?

It is attacked with local access, in a hosted service.

Am I affected by CVE-2026-57203?

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-2026-57203: Asterisk privilege escalation in ast_loggrabber via /tmp

CVE-2026-57203 · Severity: info · Published 2026-10-27

Asterisk is an open-source phone system toolkit used by organizations to route and manage calls. The ast_loggrabber utility, which administrators use to collect diagnostic logs, executes a Python script stored in the world-writable /tmp directory. An attacker with shell access can replace this script with malicious code to execute arbitrary commands with administrator privileges when the tool runs.

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

Quick answers

Is CVE-2026-57203 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-57203 being exploited in the wild.
How severe is CVE-2026-57203?: Informational severity, published 27 October 2026.
Which products and versions are affected?: Asterisk before 20.20.1, 21.x before 21.12.3, 22.x before 22.10.1, 23.x before 23.4.1; Asterisk Certified Asterisk 20.7 before 20.7-cert11, 22.8 before 22.8-cert3.
Is there a fix for CVE-2026-57203?: Yes: fixed in Asterisk 20.20.1, 21.12.3, 22.10.1, 23.4.1 and 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-2026-57203 attacked?: It is attacked with local access, in a hosted service.
Am I affected by CVE-2026-57203?: 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 and Certified Asterisk 20.7-cert11, 22.8-cert3

Technical details

The vulnerability is a privilege escalation via insecure temporary file handling (CWE-377). The ast_loggrabber script loads ast_tsconvert.py from /tmp, which is world-writable; an authenticated local attacker can place a malicious Python script there. When an administrator runs ast_loggrabber with elevated privileges, the attacker's code executes with those privileges. The fix moves the script to a secure temporary directory with restrictive permissions.

Affected products

Asterisk Asterisk before 20.20.1, 21.x before 21.12.3, 22.x before 22.10.1, 23.x before 23.4.1
Asterisk Certified Asterisk 20.7 before 20.7-cert11, 22.8 before 22.8-cert3

Timeline

2026-10-27: disclosed

References

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