What is CVE-2021-20153?

CVE-2021-20153 is a symlink vulnerability in the bittorrent functionality of Trendnet AC2600 TEW-827DRU version 2.08B01.

How does the symlink vulnerability in Trendnet AC2600 TEW-827DRU version 2.08B01 work?

The symlink vulnerability in Trendnet AC2600 TEW-827DRU version 2.08B01 allows for a symlink attack that could result in remote code execution on the device.

What is the severity of CVE-2021-20153?

CVE-2021-20153 has a severity of medium, with a CVSS score of 6.8.

How can I fix the symlink vulnerability in Trendnet AC2600 TEW-827DRU version 2.08B01?

To fix the symlink vulnerability, update the firmware of the Trendnet AC2600 TEW-827DRU router to a version that addresses the vulnerability.

Where can I find more information about CVE-2021-20153?

You can find more information about CVE-2021-20153 at the following link: https://www.tenable.com/security/research/tra-2021-54

Vulnerability/
CVE-2021-20153

medium

6.9

CWE

30/12/2021

3/8/2024

CVE-2021-20153

First published: Thu Dec 30 2021(Updated: )

Trendnet AC2600 TEW-827DRU version 2.08B01 contains a symlink vulnerability in the bittorrent functionality. If enabled, the bittorrent functionality is vulnerable to a symlink attack that could lead to remote code execution on the device. If an end user inserts a flash drive with a malicious symlink on it that the bittorrent client can write downloads to, then a user is able to download arbitrary files to any desired location on the devices filesystem, which could lead to remote code execution. Example directories vulnerable to this include "config", "downloads", and "torrents", though it should be noted that "downloads" is the only vector that allows for arbitrary files to be downloaded to arbitrary locations.

Credit: vulnreport@tenable.com

Affected Software	Affected Version	How to fix
TRENDnet TEW-827DRU firmware	=2.08b01
TRENDnet TEW-827DRU	=2.0

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Reference Links

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

Frequently Asked Questions

What is CVE-2021-20153?
CVE-2021-20153 is a symlink vulnerability in the bittorrent functionality of Trendnet AC2600 TEW-827DRU version 2.08B01.
How does the symlink vulnerability in Trendnet AC2600 TEW-827DRU version 2.08B01 work?
The symlink vulnerability in Trendnet AC2600 TEW-827DRU version 2.08B01 allows for a symlink attack that could result in remote code execution on the device.
What is the severity of CVE-2021-20153?
CVE-2021-20153 has a severity of medium, with a CVSS score of 6.8.
How can I fix the symlink vulnerability in Trendnet AC2600 TEW-827DRU version 2.08B01?
To fix the symlink vulnerability, update the firmware of the Trendnet AC2600 TEW-827DRU router to a version that addresses the vulnerability.
Where can I find more information about CVE-2021-20153?
You can find more information about CVE-2021-20153 at the following link: https://www.tenable.com/security/research/tra-2021-54

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version/trendnet tew-827dru firmware/2.08b01
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version/trendnet tew-827dru/2.0

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