CVE-2021-38703

8.8 highEPSS 4.3%

High (8.8) in kpn experia wifi firmware. 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.

Severity

CVSS 3.1

8.8 high

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

EPSS: 4.3% chance of exploitation in the next 30 days; higher than 91% of CVEs (scores of 2026-10-31)
Published: 2021-09-01
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

kpn:experia_wifi_firmware

References

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

Check your stack JSON