According to Axi0mX, the SEP chip bug can only be triggered if the hacker has physical access to the device and with a BOOTROM exploit like checkm8 or checkra1n. He also adds that the latest iPhones use the new A12/A13 system-on-chip and these chips do not have a BOOTROM exploit. Without a BOOTROM exploit, it’s impossible to know whether this bug exists on those devices. So it is not known whether A13 Bionic chip powered iPhone 11, 11 Pro/Pro Max, and the iPhone SE are vulnerable to this exploit.