CVE-2021-20161

CVSS V2 High 7.2 CVSS V3 Medium 6.8

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.

Overview

CVE ID
CVE-2021-20161

Assigner
vulnreport@tenable.com

Vulnerability Status
Analyzed

Published Version
2021-12-30T22:15:09

Last Modified Date
2022-07-12T17:42:04

Weakness Enumerations

CWE	URL
CWE-287	http://cwe.mitre.org/data/definitions/287.html

CPE Configuration (Product)

CPE	Vulnerable	Operator
		AND
cpe:2.3:o:trendnet:tew-827dru_firmware:2.08b01:::::::*	1	OR
cpe:2.3:h:trendnet:tew-827dru:2.0:::::::*	0	OR

CVSS Version 2

Version
2.0

Vector String
AV:L/AC:L/Au:N/C:C/I:C/A:C

Access Vector
LOCAL

Access Compatibility
LOW

Authentication
NONE

Confidentiality Impact
COMPLETE

Integrity Impact
COMPLETE

Availability Impact
COMPLETE

Base Score
7.2

Severity
HIGH

Exploitability Score
3.9

Impact Score
10

CVSS Version 3

Version
3.1

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

Attack Vector
PHYSICAL

Attack Compatibility
LOW

Privileges Required
NONE

User Interaction
NONE

Scope
UNCHANGED

Confidentiality Impact
HIGH

Availability Impact
HIGH

Base Score
6.8

Base Severity
MEDIUM

Exploitability Score
0.9

Impact Score
5.9

References

Reference URL	Reference Tags
https://www.tenable.com/security/research/tra-2021-54	Third Party Advisory

Sources

Source Name	Source URL
NIST	https://nvd.nist.gov/vuln/detail/CVE-2021-20161
MITRE	https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-20161

History

Created	Old Value	New Value	Data Type	Notes
2022-05-10 06:38:04				Added to TrackCVE
2022-12-06 05:21:52	2021-12-30T22:15Z	2021-12-30T22:15:09	CVE Published Date	updated
2022-12-06 05:21:52		2022-07-12T17:42:04	CVE Modified Date	updated
2022-12-06 05:21:52		Analyzed	Vulnerability Status	updated