Starwood Data Breach History
WebsiteStarwood Hotels was acquired by Marriott; brands include W, Westin, Sheraton.
This page shows all data breaches of Starwood. View the complete breach timeline, records exposed, root causes, and AI breach risk score. BreachHistory tracks disclosed data breaches worldwide.
Data Breach Timeline — All Starwood Breaches
- 2015 2015 — Starwood: Hacking, 54 records 54 records Share
- 2015 2015 — Starwood: Hacking Unknown records Share
Starwood Data Breach Summary
This page tracks the Starwood data breach history and cybersecurity incidents affecting Starwood (Unknown). BreachHistory currently indexes 2 publicly disclosed or catalogued incidents spanning 2015, with approximately 54 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 Starwood 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 Starwood Data Breaches
The largest indexed incidents include the 2015 — Starwood: Hacking, 54 records. Record counts originating from threat actors or leak sites should be treated as estimates unless confirmed by Starwood or a regulator. Below is the list of large data breaches:
- 2015 2015 — Starwood: Hacking, 54 records — about 54 records exposed · Catalogued incident
What Information Was Exposed?
Depending on the incident, exposed data may include health and medical (PHI) records, and other personal information (PII). The exact data varies between incidents, so review each breach page before assuming your information was affected.
Starwood Data Breach 2026
At the time of this update, no Starwood 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 Starwood 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 Starwood 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.