Is CVE-2025-59818 actively exploited?

No active exploitation of CVE-2025-59818 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2025-59818 be exploited remotely?

Yes. CVE-2025-59818 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2025-59818?

CVE-2025-59818 has a CVSS score of 9.8 (CRITICAL).

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CRITICAL

CVE-2025-59818

CWE-77Published: February 4, 2026· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

This vulnerability allows authenticated attackers to execute arbitrary commands on the underlying system using the file name of an uploaded file.

NVD Source

Risk Analysis

Zenitel TCIS-3 firmware contains a vulnerability where uploaded file names can be used to execute arbitrary commands on the underlying system. This critical flaw has a CVSS score of 9.8, representing a significant risk of remote code execution.

There is no known public exploit, and it is not in the CISA KEV. The vulnerability is remotely exploitable.

Recommended Action

Users should ensure the firmware is updated and restrict access to the file upload functionality.

Generated by the CTIWATCH analysis pipeline from this CVE's metadata (CVSS, EPSS, KEV status, exploit intelligence). Verify against vendor advisories before acting.

Technical Analysis

CVE-2025-59818 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.