CVE-2021-27209: TP-Link Archer c5v Firmware

High severity, CVSS 7.1. EPSS: 0.2% chance of exploitation in the next 30 days.

In the management interface on TP-Link Archer C5v 1.7_181221 devices, credentials are sent in a base64 format over cleartext HTTP.

Affected products

• TP-Link Archer c5v Firmware: version 1.7_181221 only

Published 2021-02-13. Last modified 2026-06-17.