Zero-day risk does not knock. It walks straight in when your access model leaves the door cracked open.
The old way of granting broad, persistent permissions is over. Attackers know it. Security teams know it. Yet most systems still let credentials sit around like ticking bombs, waiting for a zero-day exploit to turn them into entry points. Just-in-Time (JIT) access changes that by making access temporary, precise, and accountable.
JIT access is the discipline of granting the exact permissions needed, only at the exact moment they are needed, and then taking them away. It reduces the time window an attacker can use stolen or compromised credentials. This is not theoretical — it is one of the most direct ways to collapse the attack surface and cut down the blast radius of a breach.
Zero-day exploits thrive on persistence. A privileged account left open for days, weeks, or months is a perfect target. Even with MFA, static credentials remain exposed to phishing, session hijacking, and credential stuffing. With JIT in place, those same privileges would only exist for minutes or hours, triggered by a real job, tied to a real human, and gone before the attacker makes a move.