CVE-2021-20132: D-Link Dir-2640-Us Firmware

High severity, CVSS 8.8. EPSS: 4.3% chance of exploitation in the next 30 days.

Quagga Services on D-Link DIR-2640 less than or equal to version 1.11B02 use default hard-coded credentials, which can allow a remote attacker to gain administrative access to the zebra or ripd those services. Both are running with root privileges on the router (i.e., as the "admin" user, UID 0).

Affected products

• D-Link Dir-2640-Us Firmware: up to and including 1.11b02

Published 2021-12-30. Last modified 2026-06-17.