What is CVE-2025-67109?

CVE-2025-67109 is a critical-severity vulnerability in Eclipse Cyclone Data Distribution Service, classified under Improper Validation of Certificate Expiration. CVSS score: 10.0/10. Published 2025-12-23.

How severe is CVE-2025-67109?

Critical severity. CVSS v3 base score is 10.0 out of 10.

Vulnerability in Eclipse Cyclone Data Distribution Service

CVE-2025-67109

Improper verification of the time certificate in Eclipse Cyclone DDS before v0.10.5 allows attackers to bypass certificate checks and execute commands with System privileges.

Published 2025-12-23 · last modified 2026-07-05.

CVSS v3 metric

CVSS v3 base score 10.0 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.003 (23.8th percentile), scored 2026-10-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 24th percentile — 23.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: +0.000

Affected products

Eclipse Cyclone Data Distribution Service

Weakness classification (CWE)

CWE-298 — Improper Validation of Certificate Expiration

References

eclipse.com (Product)
github.com/eclipse-cyclonedds/cyclonedds/blob/master/src/ddsrt/src/time/posix/t… (Product)
github.com/eclipse-cyclonedds/cyclonedds/blob/master/src/security/builtin_plugi… (Product)
gist.github.com/lkloliver/669e15bc7e6194133e4ee1026ce157e6 (Third Party Advisory)

Frequently asked questions

What is CVE-2025-67109?: CVE-2025-67109 is a critical-severity vulnerability in Eclipse Cyclone Data Distribution Service, classified under Improper Validation of Certificate Expiration. CVSS score: 10.0/10. Published 2025-12-23.
How severe is CVE-2025-67109?: Critical severity. CVSS v3 base score is 10.0 out of 10.