If you are lucky, tools like ShadowExplorer, Farbar, Recuva can recover some or all data from shadow copies.
I was lucky that TrendMicro tool ( http://esupport.trendmicro.com/solution/en-us/1114221.aspx) was released shortly after my laptop was infected and it was able to decrypt Cerber1 crypt.
Also i'd recommend you to check this guide (http://manual-removal.com/cerber-501/) and to copy all encrypted data to external drive and wait till effective decryption tool will be released.
Ransomware is not easy to defeat. Cerber developers are pushing the next evolution of ransomware by going after database files. A solid data backup/restoration capability is important, as is quality antimalware to block attacks.If you do not have a complete backup for your system it would be impossible to restore the data. (Lean more about Cerber ransomware:http://guides.uufix.com/how-to-remove-cerber-ransomware-from-your-pc/)
The File Decryptor developed by Trend Micro could be helpful with the problem: