Backup exposure occurs when copies of an organization’s data are reachable by people or systems that should not have access to them. Backups may contain the same sensitive records as production systems—such as payroll, financial, customer, or project files—so their compromise can expand the amount of data at risk.
In ransomware attacks, intruders may seek out accessible backups to steal data or disrupt recovery by encrypting or deleting copies. Defenses include isolating backups from routine networks, enforcing separate credentials and least-privilege access, encrypting data, and monitoring for unusual access. Regularly testing restoration helps ensure protected copies can support recovery.