Vulnerable Systems

Exploited systems hold a power's territory only as long as a Fortified (20 ly) or Stronghold (30 ly) anchor sits inside support range. Red — vulnerable: no anchor in range or control points already below zero. Either alone is enough, so a red system may still show a full support chain. Yellow — at risk: anchored and above zero, but control points are low enough that a focused push can finish it. The tag on each row names which of the two applies.

Always double-check before committing to an undermining or reinforcing run. EDDN data is crowd-sourced and can be stale, partial, or outright wrong — in particular, supporting Fortified/Stronghold systems may exist that haven't been reported yet, which would make a "vulnerable" system here actually defended in-game.