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 were found to contain a buffer overflow vulnerability in downloadFile.cgi.
https://locrian-lightning-dc7.notion.site/BufferOverflow3-19e8e5e2b1a28048b8ddd4afdbe18d55