Low 3.3Published Oct 26, 2025

CVE-2025-12207Kamailio Grammar Rule cfg.y yyerror_at null pointer dereference

Updated under an hour ago (Oct 27, 2026, 9:40 AM ET)

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It affects n/a Kamailio. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for n/a Kamailio

Exploited in the last 30 days

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.

CVSS: 3.3 LOW (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R
Weakness (CWE): CWE-476, CWE-404
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulDB
NVD analysis: Modified
Record last updated: Feb 24, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

n/a Kamailio kamailio:kamailio	5.5	CNA record
kamailio kamailio kamailio:kamailio	5.5.0	NVD

References

References

https://vuldb.com/?id.329877	vdb-entry, technical-description, third-party-advisory
https://vuldb.com/?ctiid.329877	signature, permissions-required, vdb-entry
https://vuldb.com/?submit.673241	third-party-advisory, vdb-entry
https://shimo.im/docs/vVqRMVMlrycMO63y/	exploit, third-party-advisory
https://www.openwall.com/lists/oss-security/2025/11/02/3	related
http://www.openwall.com/lists/oss-security/2025/10/27/12
http://www.openwall.com/lists/oss-security/2025/10/27/8
https://www.openwall.com/lists/oss-security/2025/10/27/8	issue-tracking, mailing-list
https://shimo.im/docs/vVqRMVMlrycMO63y	exploit, third-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.