Full information at link above, snippet from link:
Maplesoft is investigating a security breach of its administrative database that took place on July 17th, 2012. As a result of the breach, the perpetrators gained access to some email subscription data, including email addresses, first and last names, and company and institution names. Any financial information held by Maplesoft remains secure, and has not been affected by this security breach.
The perpetrators appear to be using email addresses they have taken from the database to spread viruses or malware. The perpetrators are posing as Maplesoft in an attempt to have individuals they email click on a link or download a malicious piece of software.
From what I understand this a multipronged threat, Phishing email trying to get you to click a link to install malware, but also virus embedded in some (all?) of the emails as well.
See the Notice Box on right side of http://www.maplesoft.com/security/ for more info on that.
Figured lot of Nerds use or have used Maplesoft products.