CVE-2023-1389: TP-Link Archer AX-21 Command Injection Vulnerability

High severity, CVSS 8.8. Actively exploited: in CISA KEV since 2023-05-01. EPSS: 100% chance of exploitation in the next 30 days.

TP-Link Archer AX21 (AX1800) firmware versions before 1.1.4 Build 20230219 contained a command injection vulnerability in the country form of the /cgi-bin/luci;stok=/locale endpoint on the web management interface. Specifically, the country parameter of the write operation was not sanitized before being used in a call to popen(), allowing an unauthenticated attacker to inject commands, which would be run as root, with a simple POST request.

Affected products

• TP-Link Archer AX21 Firmware: before 1.1.4 (fixed in 1.1.4)

Published 2023-03-15. Last modified 2026-06-17.