From a security perspective, yes and no. The launcher itself only displays apps and wallpapers; it doesn’t handle internet permissions. However, is end-of-life and has unpatched vulnerabilities. If you are using a phone this old:
If you are trying to restore a missing launcher on a rooted phone, you may need to move the APK to your /system/priv-app folder and set permissions to rw-r--r-- for it to function correctly as a system app. touchwiz home 5.1 1 download
If you have a copy of your device’s stock firmware (a .tar.md5 file), you can extract system.img , then locate TouchWizHome.apk in /system/priv-app/ . This is the safest but technically difficult method. From a security perspective, yes and no