Autodesk has developed the AutoCAD Security Hotfix (located here) for Autodesk AutoCAD 2015, AutoCAD LT 2015, AutoCAD 2015-based vertical products, and other AutoCAD 2015-based products, to address the Heartbleed vulnerability. Please see this Readme file for additional details.
A security update for the Autodesk 360 desktop client has also been developed. This update will be provided via Live Update through the Autodesk 360 desktop client. If you declined the Live Update you can check the Autodesk Trust Center Page for additional details and alternative download options as they become available. For AutoCAD users: