WAVLINK Quantum D4G (WL-WN531G3) running firmware versions M31G3.V5030.201204 and M31G3.V5030.200325 has an access control issue which allows unauthenticated attackers to download configuration data and log files.
https://github.com/strik3r0x1/Vulns/blob/main/Wavlink%20WL-WN531G3.md