A new firmware update for PSP rolls out today. Sony has release the PSP firmware 6.37 today and it’s available to download via System update option in your PSP console.
Sony has release it as the minor update which improves system software stability during use of some features.
As many suspecting it might be update to fix the security flaws. You won’t notice any change in your console from the gamer point of you, it will do just some background fixes that only Sony knows.