The Pentagon suffered a data leak of more than three million people
Quick Look
- At the Pentagon, as a result of the hacking of the Defense Manpower Data Center, the personal data of more than 3 million people was leaked, including social security numbers and information about the positions of military and civilian employees.
- Access to data was unauthorized from October 2025 to July 2026.
AI-generated summary
Why It Matters
The Defense Manpower Data Center (DMDC) stores the personal information of more than 60 million people, including active duty military, reservists, civilian contractors, veterans, retirees and military family members.
At the Pentagon, the data of more than three million people was leaked as a result of the hack. A department spokesman told ABC News.
The incident affected the data of 2.76 million living people and another 294 thousand dead.
The information disclosed included social security numbers, as well as information about the positions of military and civilian employees. The US defense department acknowledged that the nature of this data may raise national security concerns.
Several unauthorized users gained unauthorized access to the Defense Manpower Data Center (DMDC) information system, which stores information about active military personnel and reservists, as well as civilian personnel, contractors, veterans, retirees and military family members. In total, its systems contain more than 60 million personnel records.
The attackers, according to the publication, had access to personal information from October 2025 to July 2026. After discovery, the vulnerability in the system was fixed. The US defense official added that there is no indication yet that the disclosed data has been misused.
What to Watch
AI outlook — possibilities, not facts
Additional security audits will be conducted on US government information systems
Likely · Within months
Open Questions
- Who exactly was behind the cyber attack?
- What measures will be taken to prevent similar incidents in the future?
- Will victims be notified of compensation or fraud protection?






