An issue in Adtran 411 ONT vL80.00.0011.M2 allows attackers to escalate privileges via unspecified vectors.
https://lanrat.com/posts/adtran-isp-hacking/
https://euvd.enisa.europa.eu/vulnerability/EUVD-2025-8769
https://drive.google.com/file/d/1levaZk5aC6g6a2zPW8xlOIVAu9MFYvAz/view