Anne Arundel County, Maryland said on October 15, 2026 that it detected irregular activity on a limited subset of its computer network on August 28, 2026, and that an unauthorized actor gained access to a limited number of systems and copied certain files from them. The county engaged third-party cybersecurity specialists for a forensic investigation and notified governmental partners, including federal law enforcement.

The county said the activity did not interfere with its operations, that there is no anticipated impact on essential services, and that there is presently no indication the files have been used for consumer fraud or identity theft or that the incident is related to any previous cyber event. A review of the copied files is ongoing to determine their contents and whether they relate to individuals; the county says it will notify affected individuals as required by law. Claims by a hacker group about the contents of the copied files have not been confirmed by the county, and The Baltimore Banner said it could not independently verify them. No record count or data exposure figure has been stated, so this is a Cybersecurity item, not a Breaches add.

Sources: Anne Arundel County; The Baltimore Banner