On March 14, 2025, Western Alliance Bank filed a notice of data breach with the Attorney General of Maine after discovering that an unauthorized party was able to access parts of its IT network through a vulnerability in a third-party software product. In this notice, Western Alliance explains that the incident resulted in an unauthorized party being able to access consumers’ sensitive information, which includes their names and Social Security numbers. Upon completing its investigation, Western Alliance began sending out data breach notification letters to all individuals whose information was affected by the recent data security incident.
If you received a data breach notification from Western Alliance Bank, it is essential you understand what is at risk and what you can do about it. A data breach lawyer can help you learn more about how to protect yourself from becoming a victim of fraud or identity theft, as well as discuss your legal options following the Western Alliance Bank data breach. For more information, please see our recent piece on the topic here.
What Caused the Western Alliance Bank Data Breach?
The Western Alliance Bank data breach was only recently announced, and more information is expected in the near future. However, Western Alliance’s filing with the Attorney General of Maine provides some important information on what led up to the breach. Evidently, Western Alliance used a third-party software product that contained an unknown vulnerability. In October 2024, an unauthorized party began exploiting that vulnerability, which gave them access to parts of Western Alliance’s systems. As a result, between October 12, 2024 and October 24, 2024, the unauthorized party was able to access certain files containing confidential Western Alliance customer information.
After learning that sensitive consumer data was accessible to an unauthorized party, Western Alliance Bank reviewed the compromised files to determine what information was leaked and which consumers were impacted. Western Alliance completed this process on February 21, 2025, and while the breached information varies depending on the individual, it may include your name and Social Security number.
On March 14, 2025, Western Alliance Bank sent out data breach letters to anyone who was affected by the recent data security incident. These letters should provide victims with a list of what information belonging to them was compromised.
More Information About Western Alliance Bank
Western Alliance Bank is a commercial bank providing business banking, lending, and financial solutions to clients across various industries. Headquartered in Phoenix, Arizona, the bank offers services such as commercial and industrial lending, treasury management, real estate financing, and specialized banking solutions for sectors like technology, healthcare, and gaming. The organization employs approximately 3,426 people and generates an estimated $3.2 billion in annual revenue.
