Tenda AC8V4.0-V16.03.34.06 was discovered to contain a stack overflow via the firewallEn parameter in the formSetFirewallCfg function.
https://github.com/DDizzzy79/Tenda-CVE/tree/main/AC8V4.0/N6
https://github.com/DDizzzy79/Tenda-CVE/blob/main/AC8V4.0/N6/README.md