CVE-2026-82765
Received Received - Intake

Path Traversal in Contec FX Series

Publication date: 2026-09-14

Last updated on: 2026-09-14

Assigner: JPCERT/CC

Description
Path traversal vulnerability exists in Contec FX5000 series, FX4000 series, and FX3000 series. If this vulnerability is exploited, arbitrary files on the server may be viewed and/or altered by an attacker who can access the product via FTP.

CVSS Scores

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Meta Information

Published
2026-09-14
Last Modified
2026-09-14
Generated
2026-09-14
AI Q&A
2026-09-14
EPSS Evaluated
N/A
NVD
CVE-2026-82765
EUVD
EUVD-2026-77248

Affected Vendors & Products

Showing 3 associated CPEs
Vendor Product Version / Range
contec fx5000 *
contec fx4000 *
contec fx3000 *

Helpful Resources

Exploitability

CWE
CWE Icon
KEV
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CWE ID Description
CWE-23 The product uses external input to construct a pathname that should be within a restricted directory, but it does not properly neutralize sequences such as ".." that can resolve to a location that is outside of that directory.

Attack-Flow Graph

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Executive Summary

This is a path traversal vulnerability in Contec FX5000, FX4000, and FX3000 series products. It allows an attacker with FTP access to view or modify arbitrary files on the server by exploiting improper path validation.

Detection Guidance

Check if Contec FX5000, FX4000, or FX3000 series devices are exposed to FTP access. Test for path traversal by attempting to access files outside the intended directory using FTP commands like 'CWD ../' or 'RETR ../../etc/passwd'.

Impact Analysis

An attacker could read sensitive files like configuration data or credentials, or alter critical system files, leading to unauthorized access, data theft, or service disruption. The high CVSS scores indicate significant risk.

Compliance Impact

This vulnerability could lead to unauthorized access to personal or health data, violating GDPR and HIPAA requirements for data protection and access controls. Non-compliance may result in legal penalties.

Mitigation Strategies

Disable FTP access to Contec devices if not required. If FTP is necessary, restrict access via firewall rules, use strong authentication, and ensure the FTP server is updated to a patched version. Monitor network traffic for suspicious FTP requests.

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