I need to be able to search a flat file (comma-separated values) for a specific value and then return the following 2 fields into variables. Here's a sample flat file:

SN,Account,IPaddress
W120394YF,adam,10.0.20.2
W394830PR,betty,10.0.20.3
W847582TD,charlie,10.0.20.4
W749509AY,donna,10.0.20.5

I already have BASH code that extracts the computer's serial number and stores it to SERIALNUM. I want to search the file for that SERIALNUM and return the following 2 fields in ACCT and IPADD. Suggestions?