US Army Data Breach History

This page tracks the US Army data breach history and cybersecurity incidents affecting US Army (United States). BreachHistory currently indexes 5 publicly disclosed or catalogued incidents spanning 2008 through 2012, with approximately 89 thousand records reported as exposed across all indexed events. These totals may include overlapping datasets or third-party estimates and should not be interpreted as unique affected users.

The US Army breach timeline includes major data breaches, cyber attacks, data leaks, credential exposures, API abuse, and other security incidents. Each incident provides details on the estimated records exposed, attack method, affected data types, and supporting public sources. Currently, 0 incidents are company-confirmed.

Largest US Army Data Breaches

The largest indexed incidents include the 2011 — US Army: Data breach reported, 50K records, the 2012 — US Army: Hackers were able to access database information…, and the 2009 — US Army: An Army database that contains personal information…, along with additional historical incidents involving exposed passwords, public databases, and large-scale data scraping. Record counts originating from threat actors or leak sites should be treated as estimates unless confirmed by US Army or a regulator. Below is the list of large data breaches:

• 2011 2011 — US Army: Data breach reported, 50K records — about 50.0K records exposed · Catalogued incident
• 2012 2012 — US Army: Hackers were able to access database information… — about 36.0K records exposed · Catalogued incident
• 2009 2009 — US Army: An Army database that contains personal information… — about 1.6K records exposed · Catalogued incident
• 2008 2008 — US Army: A laptop computer that was reported stolen from an… — about 900 records exposed · Catalogued incident

What Information Was Exposed?

Depending on the incident, exposed data may include email addresses, names, physical addresses, and other personal information (PII). The exact data varies between incidents, so review each breach page before assuming your information was affected.

US Army Data Breach 2026

At the time of this update, no US Army data breach has been catalogued for 2026. New incidents are added as official disclosures, regulatory filings, or credible cybersecurity reports become available.

What To Do If You Were Affected

If you believe your account may have been involved in a US Army data breach, change any reused passwords, enable multi-factor authentication (MFA), monitor your account for suspicious activity, and be cautious of phishing emails or fake breach notifications.

This US Army breach history is maintained by BreachHistory using public disclosures, regulatory filings, security research, and clearly labelled third-party claims. For the complete breach timeline, records exposed, incident details, and AI Breach Risk Score, explore the sections on this page.