CVE-2025-28020: Totolink a800r Firmware

High severity, CVSS 7.3. EPSS: 0.4% chance of exploitation in the next 30 days.

TOTOLINK A800R V4.1.2cu.5137_B20200730 was found to contain a buffer overflow vulnerability in downloadFile.cgi through the v25 parameter.

Affected products

• Totolink a800r Firmware: version 4.1.2cu.5137_b20200730 only

Published 2025-04-23. Last modified 2026-06-17.