Buffer overflow in Zenitel Tciv-3+

CVE-2025-64129

Zenitel TCIV-3+ is vulnerable to an out-of-bounds write vulnerability, which could allow a remote attacker to crash the device.

Vulnerability class: Buffer Overflow

Published · last modified .

CVSS v3 metric

CVSS v3 base score 7.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H.

EPSS exploit prediction

EPSS: 0.004 (36.0th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 36th percentile — 36.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2025-64129: held from 0.004 to 0.004.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2025-64129?
CVE-2025-64129 is a high-severity vulnerability in Zenitel Tciv-3+, classified under Out-of-bounds Write. CVSS score: 7.6/10. Published 2025-11-26.
How severe is CVE-2025-64129?
High severity. CVSS v3 base score is 7.6 out of 10.