CVE-2021-20161

MEDIUM

Trendnet TEW-827DRU Firmware 2.08B01 - Unauthenticated Root Shell Access via UART

Title source: llm

Description

Trendnet AC2600 TEW-827DRU version 2.08B01 does not have sufficient protections for the UART functionality. A malicious actor with physical access to the device is able to connect to the UART port via a serial connection. No username or password is required and the user is given a root shell with full control of the device.

References (1)

Core 1

Core References

Third Party Advisory x_refsource_misc

https://www.tenable.com/security/research/tra-2021-54

Scores

CVSS v3 6.8

EPSS 0.0004

EPSS Percentile 13.5%

Attack Vector PHYSICAL

CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Details

CWE

CWE-287 CWE-306

Status published

Products (1)

trendnet/tew-827dru_firmware 2.08b01

Published Dec 30, 2021

Tracked Since Feb 18, 2026