Security Magazine logo
search
cart
facebook twitter linkedin youtube
  • Sign In
  • Join Today
  • Sign Out
  • My Account
Security Magazine logo
  • NEWS
    • Security Newswire
    • Technologies & Solutions
  • MANAGEMENT
    • Leadership Management
    • Enterprise Services
    • Security Education & Training
    • Logical Security
    • Security & Business Resilience
    • Profiles in Excellence
  • PHYSICAL
    • Access Management
    • Fire & Life Safety
    • Identity Management
    • Physical Security
    • Video Surveillance
    • Case Studies (Physical)
  • CYBER
    • Cybersecurity News
    • More
  • BLOG
  • COLUMNS
    • Career Intelligence
    • Cyber Tactics
    • Cybersecurity Education & Training
    • Leadership & Management
    • Security Talk
  • EXCLUSIVES
    • Annual Guarding Report
    • Most Influential People in Security
    • The Security Benchmark Report
    • Top Guard and Security Officer Companies
    • Top Cybersecurity Leaders
    • Women in Security
  • SECTORS
    • Arenas / Stadiums / Leagues / Entertainment
    • Banking/Finance/Insurance
    • Construction, Real Estate, Property Management
    • Education: K-12
    • Education: University
    • Government: Federal, State and Local
    • Hospitality & Casinos
    • Hospitals & Medical Centers
    • Infrastructure:Electric,Gas & Water
    • Ports: Sea, Land, & Air
    • Retail/Restaurants/Convenience
    • Transportation/Logistics/Supply Chain/Distribution/ Warehousing
  • EVENTS
    • Industry Events
    • Webinars
    • Solutions by Sector
    • Security 500 Conference
  • MEDIA
    • Interactive Spotlight
    • Photo Galleries
    • Podcasts
    • Polls
    • Videos
      • Cybersecurity & Geopolitical Discussion
      • Ask Me Anything (AMA) Series
  • MORE
    • Call for Entries
    • Classifieds & Job Listings
    • Newsletter
    • Sponsor Insights
    • Store
    • White Papers
  • EMAG
    • eMagazine
    • This Month's Content
    • Advertise
  • JOIN
CybersecuritySecurity NewswireCybersecurity News

Pentagon Data Breach Exposes Military Personnel

By Security Staff
The Pentagon
Kevin Doyle via Unsplash
September 28, 2026

The Pentagon experienced a breach of its HR system, exposing sensitive information of current and past military personnel, including Social Security numbers. This breach has raised concerns about counterintelligence among experts of national security.

A vulnerable computer server belonging to the Defense Manpower Data Center (DMDC) was accessed by unauthorized users last October; however, it wasn't discovered and remediated until July. 

At this time, it is unclear how many individuals have been impacted. However, some reports suggest as many as 4 million personnel for the Department of Defense may be affected. 

KEYWORDS: data breach military military veteran Pentagon social security numbers

Share This Story

Looking for a reprint of this article?
From high-res PDFs to custom plaques, order your copy today!

Recommended Content

JOIN TODAY
To unlock your recommendations.

Already have an account? Sign In

  • SEC 2026 Benchmark Report

    2026 Security Benchmark Report

    The 2026 Security Benchmark Report surveys enterprise...
    The Security Benchmark Report
    By: Rachelle Blair-Frasier
  • Cyber tech background

    Security’s Top Cybersecurity Leaders 2026

    Security magazine’s Top Cybersecurity Leaders 2026 award...
    Top Cybersecurity Leaders
  • Iintegration and use of emerging tools

    Future Proof Your Security Career with AI Skills

    AI’s evolution demands security leaders master...
    Security Education & Training
    By: Jerry J. Brennan and Joanne R. Pollock
Manage My Account
  • Join Security
  • Manage My Preferences
  • Customer Service

More Videos

Sponsored Content

Sponsored Content is a special paid section where industry companies provide high quality, objective, non-commercial content around topics of interest to the Security audience. All Sponsored Content is supplied by the advertising company and any opinions expressed in this article are those of the author and not necessarily reflect the views of Security or its parent company, BNP Media. Interested in participating in our Sponsored Content section? Contact your local rep!

close
  • Vivotek AI Hybrid Cloud
    Sponsored byVIVOTEK Inc.

    Beyond Camera Coverage: How AI and Hybrid Cloud Redefine Security Performance

  • Northland Controls sponsored content
    Sponsored byNorthland Controls

    The Execution Gap: Why Great Security Design Doesn't Always Deliver Great Security

Popular Stories

ship in the water

Tariffs and Supply Chain Security: An Emerging Security Challenge

career intelligence

Are You the Insider Threat?

SEC 2026 Benchmark Report

2026 Security Benchmark Report

Code

Authentication Shouldn’t End After MFA Succeeds

Surveillance

Cameras Only Deter People Who Believe They’re Being Watched


2026 Security Benchmark Report

Events

November 18, 2026

How Agentic AI Transforms Incident Response from Alert to Evidence

LIVE: November 18, 2026 at 2 PM EST Learn how FTK Central, FTK Connect, APIs, SOAR integrations, endpoint agents, and ARMOUR can work together to move from security alert to defensible evidence with dramatically less manual intervention. 

December 2, 2026

Stopping Violence Before It Starts: Building a Prevention-First Security Program

LIVE: December 2, 2026 at 2 PM EST Learn strategic framework for building a comprehensive workplace violence prevention program from the ground up. Explore how organizations can shift resources toward prevention, preparation, and early intervention.

View All Submit An Event

Products

Security Culture: A How-to Guide for Improving Security Culture and Dealing with People Risk in Your Organisation

Security Culture: A How-to Guide for Improving Security Culture and Dealing with People Risk in Your Organisation

See More Products

Related Articles

  • russia data breach

    Delivery app breach exposes Russian military data

    See More
  • attack-cyberenews

    T-Mobile's Data Breach Exposes Customer's Data and Financial Information

    See More
  • Chick-Fil-A bag

    Chick-Fil-A Data Breach Exposes Customer Payment Data

    See More

Related Products

See More Products
  • Hospitality Security: Managing Security in Today's Hotel, Lodging, Entertainment, and Tourism Environment

See More Products
×

Sign-up to receive top management & result-driven techniques in the industry.

Join over 20,000+ industry leaders who receive our premium content.

JOIN TODAY!
  • RESOURCES
    • Advertise
    • Contact Us
    • Store
  • JOIN TODAY
    • Create Account
    • eMagazine
    • Newsletter
    • Customer Service
    • Manage Preferences
  • SERVICES
    • Marketing Services
    • Reprints
    • Market Research
    • List Rental
    • Survey/Respondent Access
  • STAY CONNECTED
    • LinkedIn
    • Facebook
    • YouTube
    • X (Twitter)
  • PRIVACY
    • PRIVACY POLICY
    • TERMS & CONDITIONS
    • DO NOT SELL MY PERSONAL INFORMATION
    • PRIVACY REQUEST
    • ACCESSIBILITY

Copyright ©2026. All Rights Reserved BNP Media, Inc. and BNP Media II, LLC.

Design, CMS, Hosting & Web Development :: ePublishing