Short Answer, no AVM have said that their Fritz Box's are Ok, link here

Edit - Info as its quite short.

 

 

Error in OpenSSL1.0.1f – FRITZ! Products Not Affected

 

The latest media reports indicate that a security breach has been found in OpenSSL. The good news for you as a FRITZ! user: The OpenSSL used in the FRITZ!Box models and FRITZ!WLAN Repeaters, version 0.9.8, is not affected by this vulnerability.

 

Thanks,
TheRalph