CVE-2021-38703: Kpn Experia Wifi Firmware

High severity, CVSS 8.8. EPSS: 4.3% chance of exploitation in the next 30 days.

Wireless devices running certain Arcadyan-derived firmware (such as KPN Experia WiFi 1.00.15) do not properly sanitise user input to the syslog configuration form. An authenticated remote attacker could leverage this to alter the device configuration and achieve remote code execution. This can be exploited in conjunction with CVE-2021-20090.

Affected products

• Kpn Experia Wifi Firmware: version 1.00.15 only

Published 2021-09-01. Last modified 2026-06-17.