Executive Summary

A vulnerable server at the Defense Manpower Data Center (DMDC) was accessed by unauthorized users, exposing Social Security numbers and other personal data of current and former U.S. military personnel. The breach raises counterintelligence concerns for national security experts.

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Intelligence Metadata - Source Publisher: DataBreaches.net - Published Date: 2026-09-26T11:47:03+00:00 - Category: data-breaches

Original Description: Sean Lyngaas and Davis Winkie report: A data breach at the Pentagon’s vast HR system has exposed Social Security numbers and other personal information of current and former military personnel, raising counterintelligence concerns among national security experts. “Unauthorized users” gained access to a vulnerable computer server belonging to the Defense Manpower Data Center (DMDC) beginning... Source

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