warframe.today
Kuva Fortress Assault Guide (2026): Koro, the Navar-Cannon and the Two-Minute Clock
How Assault works, what fails a run, and how to win it
Last Updated on September 30, 2026
The short answer
Assault is a one-node Sabotage variant on Koro in the Kuva Fortress. The part that fails runs is the two-minute clock to hack three Navar-Cannon systems: split them across the squad the moment it starts. Koro has no reward table, so run it for the star chart and the affinity, not as a farm.
Researched September 29, 2026, current through Update 44 (Iceblade of Narin). Picks need two independent sources; anything we could only confirm once is left out.
Table of Contents
How it works
- Assault is a Sabotage-style mission played only on Koro in the Kuva Fortress. You breach the fortress and destroy the Navar-Cannon before it fires a tectonic shell at a Tenno-allied colony.
- The first objective is a moltecoil charge that you deliver to the gates, then defend the area for 30 seconds while it melts the locks. A Friendship Door must be opened first.
- Next you find and hack three Navar-Cannon systems. After you reach the cannon room you have two minutes, and the mission fails if the clock runs out.
- The last stage is destroying four targets on the cannon's targeting mechanism and then the exposed fuel injector, which unlocks extraction. Koro is level 29 to 31, pays 3,800 credits and has no rotation reward table.
Tips that save runs
- Hack or destroy the exposed circuit on the front of each bunker first. It lowers the walls, so the console is reachable with less risk of tripping Fortress Scanners and traps.
- Ziplines or parkour across the ravine are usually quicker than running around the back of each bunker.
- Kuva Dargyns attack in the gate room and the cannon room. Bring something that can hit flyers.
- Eximus units guard the Navar-Cannon room. Clear them before you start hacking.
- Split the three cannon systems across the squad the moment the two-minute clock starts.
Mistakes that waste runs
- Setting off alarms. The fortress traps and turrets switch on when an alarm is triggered.
- Wasting time in the cannon room. The two-minute hacking clock fails the mission.
- Treating Koro as a farm. It has no rotation reward table.