CVE-2025-12207: A vulnerability has been found in Kamailio 5.5. This affects the function yyerror_at of the file src/core/cfg.y of the…
CVE-2025-12207 · Severity: low · CVSS 3.3 · Published 2025-10-27
A vulnerability has been found in Kamailio 5.5. This affects the function yyerror_at of the file src/core/cfg.y of the component Grammar Rule Handler. Such manipulation leads to null pointer dereference. The attack needs to be performed locally. The exploit has been disclosed to the public and may be used. The actual existence of this vulnerability is currently in question. This attack requires manipulating config files which might not be a realistic scenario in many cases. The vendor was contacted early about this disclosure but did not respond in any way.
No. Junglewise Threat Intelligence has no report of CVE-2025-12207 being exploited in the wild.
How severe is CVE-2025-12207?
Low severity, with a CVSS score of 3.3, published 27 October 2025.
Which products and versions are affected?
Kamailio. The advisory does not name versions.
Is there a fix for CVE-2025-12207?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
Am I affected by CVE-2025-12207?
Check whether you run Kamailio. 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.