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Sam's News — security — 2026-10-01

Security

8 Pentagon Personnel Agency Suffers Breach Exposing 3 Million Records

The US Defense Manpower Data Center (DMDC) disclosed a data breach affecting approximately 2.76 million living individuals and 294,000 deceased individuals. Unauthorized users accessed unencrypted personnel records for roughly nine months, from October 2025 until mid-July 2026, through a vulnerability in a file-sharing system. Exposed data included Social Security numbers, names, dates of birth, and military information.

  • Breach exposed approximately 3.05 million records (2.76 million living, 294,000 deceased) from the Defense Manpower Data Center
  • Unauthorized access lasted approximately 9 months, from October 2025 until mid-July 2026
  • Vulnerability discovered July 16, 2026; DMDC patched the file-sharing system immediately upon discovery
  • Exposed data included unencrypted personally identifiable information: Social Security numbers, names, dates of birth, contact details, and military occupational specialties
  • No known cybercriminal group has claimed responsibility; DoD reports no current indications of information misuse

Sources: SecurityWeek AI Web Searched, Cybersecurity Insiders AI Web Searched