NEC Aterm Series Hidden Functionality Vulnerability Allowing Telnet Access

Vulnerability

A hidden functionality vulnerability has been identified in NEC Aterm Series devices. This vulnerability allows an attacker to enable Telnet access over the network. The issue arises from an undocumented backdoor function present in the devices.

Impact

Exploitation of this vulnerability could lead to unauthorized access via Telnet, potentially allowing for further manipulation of the device or its settings.

Remediation

The remediation steps vary by model. Users should consult the NEC Aterm support pages for their specific model.

Added: Mar 27, 2026, 12:19 PM
Updated: Mar 27, 2026, 12:19 PM

Vulnerability Rating

Custom Algorithm
spread
0.0
impact
1.3
exploitability
7.4
remediation
0.0
relevance
4.8
threat
0.0
urgency
2.9
incentive
4.2

Our algorithm analyzes dozens of metrics to generate these 8 key vulnerability categories, which are then combined to calculate the overall risk score.