CVE-2022-26209: Totolink a3000ru Firmware

Critical severity, CVSS 9.8. EPSS: 2.2% chance of exploitation in the next 30 days.

Totolink A830R V5.9c.4729_B20191112, A3100R V4.1.2cu.5050_B20200504, A950RG V4.1.2cu.5161_B20200903, A800R V4.1.2cu.5137_B20200730, A3000RU V5.9c.5185_B20201128, and A810R V4.1.2cu.5182_B20201026 were discovered to contain a command injection vulnerability in the function setUploadSetting, via the FileName parameter. This vulnerability allows attackers to execute arbitrary commands via a crafted request.

Affected products

• Totolink a3000ru Firmware: version 5.9c.5185_b20201128 only
• Totolink a3100r Firmware: version 4.1.2cu.5050_b20200504 only
• Totolink a800r Firmware: version 4.1.2cu.5137_b20200730 only
• Totolink a810r Firmware: version 4.1.2cu.5182_b20201026 only
• Totolink a830r Firmware: version 5.9c.4729_b20191112 only
• Totolink a950rg Firmware: version 4.1.2cu.5161_b20200903 only

Published 2022-03-15. Last modified 2026-06-17.