Actively exploited in the wild
TP-Link Archer AX-21 Command Injection Vulnerability
TP-Link - Archer AX21 · Listed in the CISA KEV since 2023-05-01. This indicates confirmed attacks in production environments.
Required action: Apply updates per vendor instructions.
CVE-2023-1389
HighCVSS 8.8KEVSummary
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.
Risk Assessment
An unauthenticated attacker could remotely execute arbitrary commands as root, taking control of the router.
Recommendation
Update the TP-Link Archer AX21 firmware to version 1.1.4 Build 20230219 or later.
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Original NVD description (English source)
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.