CVE-2016-6558: ASUS Ea-n66 Firmware

Critical severity, CVSS 9.8. EPSS: 3.5% chance of exploitation in the next 30 days.

A command injection vulnerability exists in apply.cgi on the ASUS RP-AC52 access point, firmware version 1.0.1.1s and possibly earlier, web interface specifically in the action_script parameter. The action_script parameter specifies a script to be executed if the action_mode parameter does not contain a valid state. If the input provided by action_script does not match one of the hard coded options, then it will be executed as the argument of either a system() or an eval() call allowing arbitrary commands to be executed.

Affected products

• ASUS Ea-n66 Firmware: affected versions not specified
• ASUS Rp-AC52 Firmware: up to and including 1.0.1.1s
• ASUS Rp-AC56 Firmware: affected versions not specified
• ASUS Rp-n12 Firmware: affected versions not specified
• ASUS Rp-n14 Firmware: affected versions not specified
• ASUS Rp-n53 Firmware: affected versions not specified
• ASUS Wmp-n12 Firmware: affected versions not specified

Published 2018-07-13. Last modified 2026-06-17.