The root tool WeakSauce launched in March is receiving an update for Android 4.4.4, and it can now root HTC One M7, One M8, Droid DNA and others. The new update will root almost all HTC devices on Verizon that run on Android 4.4.4 and lower.
The update is named WeakSauce 2: The Habanero Revenge, it is free and it is easy to use. All you have to do is install the apk from XDA and run it to root your phone. After the install is finished, you can install SuperSU and you’re good to go. This is not a permanent root solution, as it will de-root when you reboot your device.
The current release is already known to have issues such as Superuser binaries being out of date which means they cannot be replaced via the automated method ( it results in showing a message you can ignore until it will be fixed) and ART does not work well with WeakSauce.
Sunshine bootloader is not compatible with Verizon HTCs at the moment, but as soon as 2015 hits, the unlocking tool will be updated.
Source: WeakSauce 2