The Uboot bootloader on the Verizon Wireless Network Extender SCS-26UC4 allows physically proximate attackers to obtain root access by connecting a crafted HDMI cable and using a sys session to modify the ramboot environment variable.

The Uboot bootloader on the Verizon Wireless Network Extender SCS-2U01 allows physically proximate attackers to bypass the intended boot process and obtain a login prompt by connecting a crafted HDMI cable and sending a SysReq interrupt.

The Verizon Wireless Network Extender SCS-2U01 has a hardcoded password for the root account, which makes it easier for physically proximate attackers to obtain administrative access by leveraging a login prompt.

The Verizon Wireless Network Extender SCS-26UC4 and SCS-2U01 does not use CAVE authentication, which makes it easier for remote attackers to obtain ESN and MIN values from arbitrary phones, and conduct cloning attacks, by sniffing the network for registration packets.