CVE-2026-2148: Tenda AC21 Firmware

High severity, CVSS 7.5. EPSS: 0.6% chance of exploitation in the next 30 days.

A security vulnerability has been detected in Tenda AC21 16.03.08.16. Affected is an unknown function of the file /cgi-bin/DownloadFlash of the component Web Management Interface. The manipulation leads to information disclosure. It is possible to initiate the attack remotely. The exploit has been disclosed publicly and may be used.

Affected products

• Tenda AC21 Firmware: version 16.03.08.16 only

Published 2026-02-08. Last modified 2026-06-17.