In cybersecurity, an ultimatum refers to a final demand or statement of terms issued by a threat actor, such as a hacker or ransomware group, to a target organization or individual. The ultimatum typically includes a deadline for compliance, such as paying a ransom or meeting specific conditions. Failure to comply with the ultimatum often results in negative consequences, such as data leaks, system destruction, or public exposure of sensitive information. Ultimatums are commonly used during ransomware attacks, cyber extortion, or hacktivist campaigns to pressure victims into quick action. Understanding and responding appropriately to ultimatums is crucial for effective incident response and risk mitigation.