Cigna Data Breach History

This page tracks the Cigna data breach history and cybersecurity incidents affecting Cigna (United States). BreachHistory currently indexes 5 publicly disclosed or catalogued incidents spanning 2006 through 2018, with approximately 5 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 Cigna 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, while 1 remain unverified claims pending independent verification.

Largest Cigna Data Breaches

The largest indexed incidents include the 2018 — Cigna: Location of breached information: Hacking/IT…, the 2015 — Cigna: Location of breached information: Unauthorized…, and the 2014 — Cigna: Location of breached information: Loss Business…, 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 Cigna or a regulator. Below is the list of large data breaches:

• 2018 2018 — Cigna: Location of breached information: Hacking/IT… — about 3.5K records exposed · Catalogued incident
• 2015 2015 — Cigna: Location of breached information: Unauthorized… — about 592 records exposed · Catalogued incident
• 2014 2014 — Cigna: Location of breached information: Loss Business… — about 527 records exposed · Catalogued incident
• 2006 2006 — Cigna: The July 11 theft of an employee's laptop left… — about 156 records exposed · Catalogued incident

What Information Was Exposed?

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

Cigna Data Breach 2026

At the time of this update, no Cigna 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 Cigna 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 Cigna 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.