Is CVE-2017-6900 actively exploited?

No active exploitation of CVE-2017-6900 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2017-6900 be exploited remotely?

Yes. CVE-2017-6900 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2017-6900?

CVE-2017-6900 has a CVSS score of 9.8 (CRITICAL).

HOME VULNERABILITIESCVE-2017-6900

CRITICAL

CVE-2017-6900

CWE-255Published: July 3, 2019· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

An issue was discovered in Riello NetMan 204 14-2 and 15-2. The issue is with the login script and wrongpass Python script used for authentication. When calling wrongpass, the variables $VAL0 and $VAL1 should be enclosed in quotes to prevent the potential for Bash command injection. Further to this, VAL0 and VAL1 should be sanitised to ensure they do not contain malicious characters. Passing it the username of '-' will cause it to time out and log the user in because of poor error handling. This will log the attacker in as an administrator where the telnet / ssh services can be enabled, and the credentials for local users can be reset. Also, login.cgi accepts the username as a GET parameter, so login can be achieved by browsing to the /cgi-bin/login.cgi?username=-%20a URI.

NVD Source

Technical Analysis

CVE-2017-6900 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.