CVE-2025-64091Network attack vector

Authenticated command execution via NTP configuration

Published Jan 9, 2026 · Updated Jan 9, 2026

OS command injection in Zenitel TCIS-3+ before 9.2.3.3 allows remote authenticated users to execute commands through NTP settings. The legacy web interface's NTP configuration handling fails to neutralize shell metacharacters before invoking an operating-system command. Administrative access to the device web interface is required; successful exploitation runs commands in the appliance firmware context.

CVSS severity8.6
High
EPSS probability0.36%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

OS command injection in Zenitel TCIS-3+ before 9.2.3.3 allows remote authenticated users to execute commands through NTP settings. The legacy web interface's NTP configuration handling fails to neutralize shell metacharacters before invoking an operating-system command. Administrative access to the device web interface is required; successful exploitation runs commands in the appliance firmware context.

The record

CVE
CVE-2025-64091
Published
Jan 9, 2026
Updated
Jan 9, 2026
Vendor
Zenitel
Product
TCIS-3+
Classifications
CWE-78, T1059
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 9, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 9, 2026Record 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=<9.2.3.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Zenitel · TCIS-3+version=<9.2.3.3

Published CVSS scores

8.6National Cyber Security Centre NetherlandsCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
8.8NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1059Command and Scripting Interpreter

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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