Pentagon data breach exposes Social Security numbers, personal info of 2.76M US military, civilian personnel
A security flaw in a file-sharing system exposed unencrypted personnel records, and the Pentagon said 2.76 million living people were affected.
- The Defense Manpower Data Center discovered a "security vulnerability" in a file-sharing system in July that allowed unauthorized users to access unencrypted personally identifiable information between October 2025 and July 16, 2026.
- Approximately four million Defense Department personnel may be affected by the breach, which exposed Social Security numbers and the "occupational specialty" of service members.
- The Defense Department is offering affected individuals one year of credit monitoring through IDX, while Gen. Paul Stanton, director of the Defense Information Systems Agency, is leading a "cyber hunt" to evaluate systems for additional vulnerabilities.
- Justin Sherman, CEO of Global Cyber Strategies, warned adversaries could pair stolen information with commercial datasets to target personnel based on earnings, debts, marriages, and spending habits.
- While the Pentagon currently "does not have any indications of misuse," the DMDC remains "the one, central access point" for military benefits and medical readiness information for personnel and veterans.
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143 Articles
Hackers stole Pentagon personnel records of over 3 million people
The Pentagon's Defense Manpower Data Center (DMDC) is notifying millions of military service members that hackers stole their data after breaching the Pentagon's human resources management system in October 2025. [...]
In this article, we review the details of the penetration and its effects. The hacking of millions of United States military personnel has warned the US government that millions of current and former United States military personnel and staff members were robbed of their personal information during a multi-month break in the records of individuals in the Department of Defense, the most recent... the hacking of the US Army's data: the theft of 2.…
EXPOSED: Pentagon Data Breach Leaks Social Security Numbers of 2.76 MILLION Military and Civilian Personnel
A monthslong breach at the Defense Manpower Data Center exposed unencrypted personal data — including Social Security numbers and job details — belonging to millions of service members, civilians, and the deceased, and the Pentagon sat on the vulnerability for months before notifying anyone.
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