How severe is CVE-2025-12205?

CVE-2025-12205 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2025-12205 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (11th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-12205?

CVE-2025-12205 affects Kamailio. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-12205?

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

Does CVE-2025-12205 have an EU (EUVD) identifier?

Yes. CVE-2025-12205 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-36071.

When was CVE-2025-12205 published?

CVE-2025-12205 was published on 2025-10-27 and last updated on 2026-06-17.

CVE-2025-12205

CVE-2025-12205 is a medium-severity vulnerability in Kamailio with a CVSS 3.x base score of 5.3. 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-416.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
CVSS v2: 4.3
CVSS v4: 1.9
EPSS exploit prediction: 0% (11th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-36071
Weakness: CWE-416
Affected product: Kamailio
Published: 2025-10-27
Last modified: 2026-06-17

Description

A vulnerability was detected in Kamailio 5.5. The affected element is the function sr_push_yy_state of the file src/core/cfg.lex of the component Configuration File Handler. The manipulation results in use after free. The attack must be initiated from a local position. The exploit is now public and may be used. The real existence of this vulnerability is still doubted at the moment. 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-2025-12205?: A vulnerability was detected in Kamailio 5.5. The affected element is the function sr_push_yy_state of the file src/core/cfg.lex of the component Configuration File Handler. The manipulation results in use after free. The attack must be initiated from a local position. The exploit is now public and may be used. The real existence of this vulnerability is still doubted at the moment. 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-2025-12205?: CVE-2025-12205 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2025-12205 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (11th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-12205?: CVE-2025-12205 affects Kamailio. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-12205?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-12205 have an EU (EUVD) identifier?: Yes. CVE-2025-12205 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-36071.
When was CVE-2025-12205 published?: CVE-2025-12205 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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