“Alright agents, before we move on to the actual mission brief, We're going to engage in a brief mental exercise. Close your eyes, turn off your entoptic displays, and use your imagination like an Amish caveman would.
I happen to know that none of you are sleeved in your original morph. So, I want you to visualize the body you were born in, back before the Fall. Try to remember your face, your torso, the backs of your hands, et cetera and so forth. Do this for the next minute.
Now, open your optics and stare in dismay at the AR mirror I just summoned into your visual field. Those mild feelings of disorientation you're experiencing right now are but a pale shadow of the revulsion and existential dread you WOULD be suffering, were it not for a little-known mod the psychosurgeons call the “Homonculus Hack”. It's a minor change to the somatosensory cortex that makes your body image just a little bit more flexible, while leaving your subjective sense of self intact.
Originally, it was a specialized treatment for body dysmorphia, but when resleeving became technically feasible, the hack was essential for making its widespread use practical. The only morphs that don't have it these days are either naturally born H. sapiens without cortical stacks, or those deliberately designed to be uncomfortable for the luckless ego trapped in them. Without it, transhumanity as a whole would be even more screamingly insane than we already are. It's just a pity that it's also a security hole...”
So there's the idea. Firewall is just now discovering a backdoor that could be used to potentially subvert almost everyone in the system. Fortunately it's easy to fix, but how do you disseminate the patch without alerting anyone who might be inclined to exploit the flaw while it's still there? How can you tell if anyone has already been using it? And should you even fix it at all, or leave it in place against the day when Firewall itself might need an edge? Is that day today...?