Pentagon Confirms Data Breach Affecting More Than 3 Million People
Technology
Personal information belonging to more than 3 million people was exposed following unauthorized access to an information system operated by the Pentagon’s Defense Manpower Data Center (DMDC). Those affected include military personnel, civilian employees, veterans, contractors and military family members.
According to a U.S. Defense Department official, the breach affected 2.76 million living people and about 294,000 deceased individuals. The compromised information included Social Security numbers and details about professional roles.
Unauthorized access continued from October 2025 through July 2026. After discovering the vulnerability, DMDC remediated it. The Pentagon said it has so far found no evidence that the exposed information was misused. Affected individuals are being offered identity-protection and credit-monitoring services.
DMDC is one of the Pentagon’s main repositories of personnel information. Its systems contain records on more than 60 million people, including active-duty and reserve military personnel, civilian employees, veterans, contractors and military family members.
The incident has raised concern because of the nature of the exposed information, including details about the jobs held by military and civilian personnel. The U.S. Defense Department has not yet disclosed who was behind the unauthorized access or whether the information obtained was transferred to third parties.
According to ABC News, the breach came to light after a vulnerability in the DMDC system was discovered. The Pentagon is continuing to assess the incident and notify affected individuals.
Unauthorized access continued from October 2025 through July 2026. After discovering the vulnerability, DMDC remediated it. The Pentagon said it has so far found no evidence that the exposed information was misused. Affected individuals are being offered identity-protection and credit-monitoring services.
DMDC is one of the Pentagon’s main repositories of personnel information. Its systems contain records on more than 60 million people, including active-duty and reserve military personnel, civilian employees, veterans, contractors and military family members.
The incident has raised concern because of the nature of the exposed information, including details about the jobs held by military and civilian personnel. The U.S. Defense Department has not yet disclosed who was behind the unauthorized access or whether the information obtained was transferred to third parties.
According to ABC News, the breach came to light after a vulnerability in the DMDC system was discovered. The Pentagon is continuing to assess the incident and notify affected individuals.
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