A NULL pointer dereference in TOTOLINK N600R firmware v4.3.0cu.7866_B2022506 allows attackers to cause a Denial of Service.
https://github.com/z472421519/BinaryAudit/blob/main/PoC/NPD/TOTOLink/CONTENT_LENGTH.md
https://gist.github.com/z472421519/d17061ea79a72d39fe69c000fa1a6280