CVE-2021-38703

8.8 HIGH

Wireless devices running certain Arcadyan-derived firmware (such as KPN Experia WiFi 1.00.15) do not properly sanitise user input to the ...

Published: 2021-09-01 · Last updated: 2026-06-17

Severity and scoring

CVSS: 8.8 HIGH
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

Vendor	Product
kpn	experia_wifi_firmware

Description

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.

Source: NVD

References

[NVD]https://nvd.nist.gov/vuln/detail/CVE-2021-38703
[Exploit reference]https://7bits.nl/journal/posts/cve-2021-38703-kpn-experia-wifi-root-shell/
[Vendor advisory]https://www.kpnwebshop.com/modems-routers/producten/experia-wifi/2
[Exploit reference]https://7bits.nl/journal/posts/cve-2021-38703-kpn-experia-wifi-root-shell/
[Vendor advisory]https://www.kpnwebshop.com/modems-routers/producten/experia-wifi/2