How severe is CVE-2025-12206?

CVE-2025-12206 has a CVSS 3.x base score of 3.3, rated low severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.

Is CVE-2025-12206 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (12th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-12206?

CVE-2025-12206 affects Kamailio. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-12206?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-12206 have an EU (EUVD) identifier?

Yes. CVE-2025-12206 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-36070.

When was CVE-2025-12206 published?

CVE-2025-12206 was published on 2025-10-27 and last updated on 2026-06-17.

CVE-2025-12206

CVE-2025-12206 is a low-severity vulnerability in Kamailio with a CVSS 3.x base score of 3.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-476.

Key facts

Severity: Low (CVSS 3.x base score 3.3)
CVSS v2: 1.7
CVSS v4: 1.9
EPSS exploit prediction: 0% (12th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-36070
Weakness: CWE-476
Affected product: Kamailio
Published: 2025-10-27
Last modified: 2026-06-17

Description

A flaw has been found in Kamailio 5.5. The impacted element is the function rve_is_constant of the file src/core/rvalue.c. This manipulation causes null pointer dereference. The attack needs to be launched locally. The exploit has been published and may be used. It is still unclear if this vulnerability genuinely exists. 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.

Frequently asked questions

What is CVE-2025-12206?: A flaw has been found in Kamailio 5.5. The impacted element is the function rve_is_constant of the file src/core/rvalue.c. This manipulation causes null pointer dereference. The attack needs to be launched locally. The exploit has been published and may be used. It is still unclear if this vulnerability genuinely exists. 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.
How severe is CVE-2025-12206?: CVE-2025-12206 has a CVSS 3.x base score of 3.3, rated low severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.
Is CVE-2025-12206 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (12th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-12206?: CVE-2025-12206 affects Kamailio. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-12206?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-12206 have an EU (EUVD) identifier?: Yes. CVE-2025-12206 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-36070.
When was CVE-2025-12206 published?: CVE-2025-12206 was published on 2025-10-27 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:kamailio:kamailio:5.5.0:*:*:*:*:*:*:*

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