CVE-2025-64129Network attack vector

Device crash via out-of-bounds web write

Published Nov 26, 2025 · Updated Nov 26, 2025

Out-of-bounds write in Zenitel TCIV-3+ 9.3.3.0 and earlier allows remote authenticated users to crash the device via web input. Zenitel identifies only legacy web-interface components and added input validation, leaving the exact component, request field, and faulty write operation undisclosed. The vendor requires authenticated administrative access, while the CNA score instead specifies no privileges and active user interaction; the bounded consequence is a device crash.

CVSS severity7.0
High
EPSS probability0.44%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds write in Zenitel TCIV-3+ 9.3.3.0 and earlier allows remote authenticated users to crash the device via web input. Zenitel identifies only legacy web-interface components and added input validation, leaving the exact component, request field, and faulty write operation undisclosed. The vendor requires authenticated administrative access, while the CNA score instead specifies no privileges and active user interaction; the bounded consequence is a device crash.

The record

CVE
CVE-2025-64129
Published
Nov 26, 2025
Updated
Nov 26, 2025
Vendor
Zenitel
Product
TCIV-3+
Classifications
CWE-787, T1499
Attack vector
network
Privileges
Unavailable

Timeline

How it unfolded

  1. Nov 26, 2025CVE publishedPublication date reported by the CVE source.
  2. Nov 26, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=9.3.3.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesUnavailable in this record.

What is affected?

Zenitel · TCIV-3+version=0 <=9.3.3.0

Published CVSS scores

7.6ICS-CERTCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H
7.0ICS-CERTCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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