CVE-2021-38703

HighCVSS 8.8/10Last modified Jun 17, 2026

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.

Metrics

CVSS 3.1 8.8/10CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected software

Vendor	Product	Versions
n/a	n/a	n/a

References

https://7bits.nl/journal/posts/cve-2021-38703-kpn-experia-wifi-root-shell/Exploit, Third Party Advisory
https://www.kpnwebshop.com/modems-routers/producten/experia-wifi/2Vendor Advisory
https://7bits.nl/journal/posts/cve-2021-38703-kpn-experia-wifi-root-shell/Exploit, Third Party Advisory
https://www.kpnwebshop.com/modems-routers/producten/experia-wifi/2Vendor Advisory

Timeline

Published: Sep 1, 2021
Last modified: Jun 17, 2026
NVD status: Modified

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