CVE-2021-42232: tp-link archer_a7_firmware OS Command Injection

Vulnerability summary

CVE-2021-42232 is a critical (CVSS 9.8) OS Command Injection vulnerability in tp-link archer_a7_firmware. EPSS estimates a 4.20% chance of exploitation in the next 30 days, higher than 90.8% of scored vulnerabilities.

Timeline

1. 23-08-2022
   PublishedVulnerability first disclosed.
2. 09-07-2026
   Last modifiedVulnerability information updated.

Description

TP-Link Archer A7 Archer A7(US)_V5_210519 is affected by a command injection vulnerability in /usr/bin/tddp. The vulnerability is caused by the program taking part of the received data packet as part of the command. This will cause an attacker to execute arbitrary commands on the router.

• CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.