Cisco released several patches after 15.0(2)SE11, including 15.0(2)SE12 and 15.0(2)SE13. However, these later releases introduced new bugs for the legacy 3560 platform without significantly improving security over SE11. Many senior engineers consider SE11 the "last truly stable" image. Key reasons include:
Let’s cut to the chase: Finding c3560ipservicesk9mz150-2.se11.bin on the public internet is easy. Downloading it safely and legally? That is the hard part.