Obviously there are time asymmetries between discovering a problem, developing a fix and deploying the fix.

Depending on the details it may require significant hardware upgrades.

In the real world outside of software everything is not solvable through a simple patch.

Last if you believe NATO is prepared for a real conflict I suggest you compare with how much of the world including institutions meant to keep us safe responded to Covid: denial, lies, misinformation, and hysteria.