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Zenitel TCIV-3+

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CVEVulnerabilityUpdateCritical

Overview

The Zenitel TCIV-3+ device has critical vulnerabilities, including OS Command Injection and Cross-site Scripting, with a CVSS v4 score of 10.0, indicating a severe risk of arbitrary code execution and denial-of-service. Users are strongly advised to upgrade to version 9.3.3.0 or later to mitigate these risks.

Key Takeaways

  • Affected Systems: Zenitel TCIV-3+ (all versions prior to 9.3.3.0), vulnerabilities include OS Command Injection (CVE-2025-64126, CVE-2025-64127, CVE-2025-64128), Out-of-bounds Write (CVE-2025-64129), and Cross-site Scripting (CVE-2025-64130).
  • Action Required: Upgrade to Zenitel TCIV-3+ Version 9.
  • Timeline: Disclosed on November 25, 2025

Original Article Summary

View CSAF 1. EXECUTIVE SUMMARY CVSS v4 10.0 ATTENTION: Exploitable remotely/low attack complexity Vendor: Zenitel Equipment: TCIV-3+ Vulnerabilities: OS Command Injection, Out-of-bounds Write, Cross-site Scripting 2. RISK EVALUATION Successful exploitation of these vulnerabilities could result in arbitrary code execution or cause a denial-of-service condition. 3. TECHNICAL DETAILS 3.1 AFFECTED PRODUCTS The following versions of TCIV-3+ are affected: TCIV-3+: All versions prior to 9.3.3.0 3.2 VULNERABILITY OVERVIEW 3.2.1 IMPROPER NEUTRALIZATION OF SPECIAL ELEMENTS USED IN AN OS COMMAND ('OS COMMAND INJECTION') CWE-78 An OS command injection vulnerability exists due to improper input validation. The application accepts a parameter directly from user input without verifying it is a valid IP address or filtering potentially malicious characters. This could allow an unauthenticated attacker to inject arbitrary commands. CVE-2025-64126 has been assigned to this vulnerability. A CVSS v3 base score of 9.8 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H). A CVSS v4 score has also been calculated for CVE-2025-64126. A base score of 10.0 has been calculated; the CVSS vector string is (AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:L/SA:H). 3.2.2 IMPROPER NEUTRALIZATION OF SPECIAL ELEMENTS USED IN AN OS COMMAND ('OS COMMAND INJECTION') CWE-78 An OS command injection vulnerability exists due to insufficient sanitization of user-supplied input. The application accepts parameters that are later incorporated into OS commands without adequate validation. This could allow an unauthenticated attacker to execute arbitrary commands remotely. CVE-2025-64127 has been assigned to this vulnerability. A CVSS v3 base score of 9.8 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H). A CVSS v4 score has also been calculated for CVE-2025-64127. A base score of 10.0 has been calculated; the CVSS vector string is (AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:L/SA:H). 3.2.3 IMPROPER NEUTRALIZATION OF SPECIAL ELEMENTS USED IN AN OS COMMAND ('OS COMMAND INJECTION') CWE-78 An OS command injection vulnerability exists due to incomplete validation of user-supplied input. Validation fails to enforce sufficient formatting rules, which could permit attackers to append arbitrary data. This could allow an unauthenticated attacker to inject arbitrary commands. CVE-2025-64128 has been assigned to this vulnerability. A CVSS v3 base score of 9.8 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H). A CVSS v4 score has also been calculated for CVE-2025-64128. A base score of 10.0 has been calculated; the CVSS vector string is (AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:L/SA:H). 3.2.4 OUT-OF-BOUNDS WRITE CWE-787 The affected product is vulnerable to an out-of-bounds write vulnerability, which could allow a remote attacker to crash the device. CVE-2025-64129 has been assigned to this vulnerability. A CVSS v3 base score of 7.6 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H). A CVSS v4 score has also been calculated for CVE-2025-64129. A base score of 7.0 has been calculated; the CVSS vector string is (AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N). 3.2.5 IMPROPER NEUTRALIZATION OF INPUT DURING WEB PAGE GENERATION ('CROSS-SITE SCRIPTING') CWE-79 The affected product is vulnerable to a reflected cross-site scripting vulnerability, which could allow a remote attacker to execute arbitrary JavaScript on the victim's browser. CVE-2025-64130 has been assigned to this vulnerability. A CVSS v3 base score of 9.8 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H). A CVSS v4 score has also been calculated for CVE-2025-64130. A base score of 9.3 has been calculated; the CVSS vector string is (AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N). 3.3 BACKGROUND CRITICAL INFRASTRUCTURE SECTORS: Communications COUNTRIES/AREAS DEPLOYED: Worldwide COMPANY HEADQUARTERS LOCATION: Belgium 3.4 RESEARCHER Nir Tepper and Noam Moshe of Claroty Team82 reported these vulnerabilities to CISA. 4. MITIGATIONS Zenitel recommends users to upgrade to Version 9.3.3.0 or later. CISA recommends users take defensive measures to minimize the risk of exploitation of these vulnerabilities, such as: Minimize network exposure for all control system devices and/or systems, ensuring they are not accessible from the Internet. Locate control system networks and remote devices behind firewalls and isolating them from business networks. When remote access is required, use more secure methods, such as Virtual Private Networks (VPNs), recognizing VPNs may have vulnerabilities and should be updated to the most current version available. Also recognize VPN is only as secure as the connected devices. CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures. CISA also provides a section for control systems security recommended practices on the ICS webpage on cisa.gov/ics. Several CISA products detailing cyber defense best practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies. CISA encourages organizations to implement recommended cybersecurity strategies for proactive defense of ICS assets. Additional mitigation guidance and recommended practices are publicly available on the ICS webpage at cisa.gov/ics in the technical information paper, ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation Strategies. Organizations observing suspected malicious activity should follow established internal procedures and report findings to CISA for tracking and correlation against other incidents. No known public exploitation specifically targeting these vulnerabilities has been reported to CISA at this time. 5. UPDATE HISTORY November 25, 2025: Initial Publication

Impact

Zenitel TCIV-3+ (all versions prior to 9.3.3.0), vulnerabilities include OS Command Injection (CVE-2025-64126, CVE-2025-64127, CVE-2025-64128), Out-of-bounds Write (CVE-2025-64129), and Cross-site Scripting (CVE-2025-64130).

Exploitation Status

No active exploitation has been reported at this time. However, organizations should still apply patches promptly as proof-of-concept code may exist.

Timeline

Disclosed on November 25, 2025

Remediation

Upgrade to Zenitel TCIV-3+ Version 9.3.3.0 or later. Implement defensive measures such as minimizing network exposure for control system devices, using firewalls, and secure remote access methods like VPNs. Conduct proper impact analysis and risk assessment before deploying defensive measures.

Additional Information

This threat intelligence is aggregated from trusted cybersecurity sources. For the most up-to-date information, technical details, and official vendor guidance, please refer to the original article linked below.

Related Topics: This incident relates to CVE, Vulnerability, Update, and 1 more.

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