CVE-2020-26887: Avm Fritz!box 7490 Firmware

High severity, CVSS 7.8. EPSS: 1.4% chance of exploitation in the next 30 days.

FRITZ!OS before 7.21 on FRITZ!Box devices allows a bypass of a DNS Rebinding protection mechanism.

Affected products

• Avm Fritz!box 7490 Firmware: before 7.21 (fixed in 7.21)

Published 2020-10-23. Last modified 2026-06-17.