A Literal Missile
It’s not a pretty sight. It’s a Russian Anti-Tank Guided Missile, which is effectively an anti-tank guided weapon that fires missiles. The real question is why such a deadly device is just sitting in the corner?
We’d guess that this server room was formerly an armory, and it may have been repurposed, necessitating the removal of all of the munitions. If this is the case, someone clearly didn’t do an excellent job with that. It’s hard to imagine how dangerous it would be!