Threat Levels

Catastrophic threat.

Critical security situations within a network dictate an immediate and focused defensive action. This condition may be imminent or ongoing.

Focused attacks.

Specific vulnerabilities and weaknesses are the target of Internet attacks and require immediate defensive action.

Increased vigilance.

Vulnerabilities or threats to computer networks require vulnerability assessment and corrective action.

Regular vigilance.

Ordinary activity compromises an unprotected network minutes to hours after first being connected to the Internet.