CVE-2025-28027: Totolink a3000ru Firmware

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

TOTOLINK A830R V4.1.2cu.5182_B20201102, A950RG V4.1.2cu.5161_B20200903, A3000RU V5.9c.5185_B20201128, and A3100R V4.1.2cu.5247_B20211129 was found to contain a buffer overflow vulnerability in downloadFile.cgi.

Affected products

• Totolink a3000ru Firmware: version 5.9c.5185_b20201128 only
• Totolink a3100r Firmware: version 4.1.2cu.5247_b20211129 only
• Totolink a830r Firmware: version 4.1.2cu.5182_b20201102 only
• Totolink a950rg Firmware: version 4.1.2cu.5161_b20200903 only

Published 2025-04-22. Last modified 2026-06-17.