Staying Safe in Times of Cyber Uncertainty
Check Point Advisories

TP-Link Archer C20i Command Injection (CVE-2021-44827)

Check Point Reference: CPAI-2021-1150
Date Published: 13 Apr 2022
Severity: High
Last Updated: Wednesday 13 April, 2022
Source:
Industry Reference:CVE-2021-44827
Protection Provided by:

Security Gateway
R81, R80, R77, R75

Who is Vulnerable? Archer C20i firmware version 0.9.1 3.2 v003a.0 Build 170221 Rel.55462 or older
Vulnerability Description A command injection vulnerability exists in TP-Link Archer C20i. Successful exploitation of this vulnerability could allow a remote attacker to execute arbitrary commands on the affected system.

Protection Overview

This protection detects attempts to exploit this vulnerability.

In order for the protection to be activated, update your Security Gateway product to the latest IPS update. For information on how to update IPS, go to SBP-2006-05, click on Protection tab and select the version of your choice.

Security Gateway R81 / R80 / R77 / R75

  1. In the IPS tab, click Protections and find the TP-Link Archer C20i Command Injection (CVE-2021-44827) protection using the Search tool and Edit the protection's settings.
  2. Install policy on all Security Gateways.

This protection's log will contain the following information:

Attack Name:  Application Servers Protection Violation.
Attack Information:  TP-Link Archer C20i Command Injection (CVE-2021-44827)

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