Trendnet AC2600 TEW-827DRU version 2.08B01 does not have sufficient protections for the UART functionality.

published 2021-12-30 4y ago modified 2026-06-17 4mo ago also EUVD-2021-7618

cvss: 6.8; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 0.3%; EPSS 0.3% chance of exploitation in 30 days, percentile 17%
public exploits: 0; none known

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.

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Exploit prediction

0.26% chance of exploitation in the next 30 days, higher than 17% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by	version	score	vector
NVD	3.1	6.8	CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD	2.0	7.2	AV:L/AC:L/Au:N/C:C/I:C/A:C

Affected products

n/a Trendnet AC2600 TEW-827DRU

Classification

Weakness

CWE-287 Improper Authentication
CWE-306 Missing Authentication for Critical Functionality

References

tenable.com /security/research/tra-2021-54
third-party-advisory

Sources

CVE List CVE-2021-20161
NVD CVE-2021-20161

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