v5.07.49-en is a maintenance release focused on stability and security patching rather than new features. It sits in the "late lifecycle" phase for most Tenda AC routers. For users on very old firmware (pre-2020), this is a mandatory security update. For users on recent builds, it offers minor QoS improvements and a fix for a specific IPTV/VLAN bug.
It fixes real security vulnerabilities and a nasty IPv6 PD bug, and it cleans up the memory leak that slowly killed older Tendas. However, the regression in Parental Controls and the mandatory factory reset requirement (which most home users will ignore, leading to bad reviews) hold it back. v5.07.49-en tenda upgrade
Update now. If you rely on website filtering for kids: Stay on your current version or buy a different router brand. For users on recent builds, it offers minor