Data breaches

Pentagon Data Breach Exposes Personal Info of 3 Million People

A Pentagon personnel agency breach exposes data on military staff, retirees, and families; no misuse detected yet. Includes SSNs and contact details.

By Content Team

Sep 30, 2026

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The Defense Manpower Data Center began notifying roughly 3 million people on September 18 that their personal data was exposed — 2.76 million living and 294,000 deceased. The exposed information includes full Social Security numbers, names, dates of birth, contact and demographic details, and military occupational specialties.

An unauthorized party reached an unencrypted file-sharing system between October 2025 and July 16, 2026, when DMDC found the vulnerability and patched it. The agency holds at least 60 million records covering military and civilian personnel, contractors, retirees, veterans, and their families.

DMDC says there is no indication the information has been misused, and no group has claimed responsibility — though the department declined to say who accessed the data or whether the breach was deliberate. Affected people are being offered 12 months of credit monitoring and identity restoration through IDX.

Source: SecurityWeek

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