HOMEVULNERABILITIESCVE-2025-12207
MEDIUM

CVE-2025-12207

CWE-404Published: October 27, 2025· Updated: Jun 17, 2026

5.5
CVSS v3.1

Official Description

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.

NVD Source

Technical Analysis

CVE-2025-12207 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 5.5.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorLocal
Attack ComplexityLow
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected Vendors & Products

kamailio1 product(s)
kamailio
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://shimo.im/docs/vVqRMVMlrycMO63y/
ADVISORYhttps://vuldb.com/?id.329877
ADVISORYhttps://vuldb.com/?submit.673241
ADVISORYhttps://shimo.im/docs/vVqRMVMlrycMO63y

All References (9)

→
https://shimo.im/docs/vVqRMVMlrycMO63y/Exploit · Third Party Advisory
→
https://vuldb.com/?ctiid.329877Permissions Required · VDB Entry
→
https://vuldb.com/?id.329877Third Party Advisory · VDB Entry
→
https://vuldb.com/?submit.673241Third Party Advisory · VDB Entry
→
https://www.openwall.com/lists/oss-security/2025/11/02/3
→
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/2025/10/27/8Issue Tracking · Mailing List
→
https://shimo.im/docs/vVqRMVMlrycMO63yExploit · Third Party Advisory

Quick Facts

CVE IDCVE-2025-12207
CVSS Score5.5 / 10
SeverityMEDIUM
WeaknessCWE-404
CISA KEVNo
Affected1 vendor(s)
PublishedOct 27, 2025

Related CVEs (CWE-404)

CVE-2023-24444
9.8
CVE-2025-5867
9.8
CVE-2018-8450
8.8
CVE-2026-1875
8.7
CVE-2026-11317
8.7
CVE-2026-1876
8.7

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2025-12207 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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