An issue was discovered in Peplink Balance Two before 8.4.0. A missing authorization check in the administration web service allows read-only, unprivileged users to obtain sensitive information about the device configuration.
https://www.synacktiv.com/sites/default/files/2023-12/synacktiv-peplink-multiple-vulnerabilities.pdf
https://www.synacktiv.com/publications%253Ffield_tags_target_id%253D4