What’s Vulnerable › Vulnerabilities

CVE-2021-38703

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 4.3% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-09-01 · updated 2026-06-17

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.

Affected products

• Kpn Experia Wifi Firmware: 1.00.15

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

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