Green Tree Services notifies mortgage applicants of 2013 breach that was discovered 10 months ago

Green Tree Services is mailing breach notification letters that begin:

I am writing to explain a recent security incident that may involve your personal information. Green Tree Servicing LLC (“Green Tree”) has learned that personal information relating to some customers may have been accessible in a security incident involving potential unauthorized access to certain computer applications residing on servers operated on behalf of Green Tree. The personal information that may have been accessible in the incident includes your name, Social Security number or other personal information included on mortgage forms. We wanted to reach out to inform you of what we are doing to protect you and what you can do to protect yourself.