Pentagon Recordkeeping Unit Alerts 3 Million After 10-Month Data Breach
A Department of Defense recordkeeping unit, the Defense Manpower Data Center (DMDC), has alerted millions of current and former military members and staff that their data was stolen during a breach that lasted from October 2025 to July 2026, TechCrunch reported Wednesday (Sept. 30). The breach exposed people’s name, date of birth, sex, race, Social […] The post Pentagon Recordkeeping Unit Alerts…
The Department of Defense's recordkeeping unit, the Defense Manpower Data Center (DMDC), has notified approximately 3 million individuals that their personal data was compromised during a data breach lasting from October 2025 to July 2026. The exposed information includes name, date of birth, sex, race, Social Security number, and details about their military service.
The breach impacted about 2.8 million living individuals and 300,000 deceased persons, according to reports from CNN and Federal News Network. The DMDC stated in a letter to affected individuals that they are assessing and enhancing the cybersecurity measures of their system. A Pentagon official disclosed that a small number of unauthorized users gained access to the data during the period it was exposed.
This comes following reports that a large trove of data allegedly stolen from the FBI includes sensitive intelligence, counterespionage, and security operations information. Additionally, Senator Mark Warner called on the Department of Homeland Security and Department of Justice to investigate a breach of the DHS information-sharing network called Homeland Security Information Network (HSIN).
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