Google released one of its in-house tools used to help assess vendor security. They have released both the questionnaires and source code on Github (link below). For organisations which have to regularly assess the high level security controls in place for vendors this approach is quite novel, the questionnaire changes based on the responses and (where relevant) displays warnings and security advice to the vendor within the form itself.

Quote:

Based on this positive response, we’ve decided to open source the VSAQ Framework (Apache License Version 2) and the generally applicable parts of our questionnaires on GitHub: https://github.com/google/vsaq. We hope it will help companies spin up, or further improve their own vendor security programs. We also hope the base questionnaires can serve as a self-assessment tool for security-conscious companies and developers looking to improve their security posture.

The VSAQ Framework comes with four security questionnaire templates that can be used with the VSAQ rendering engine:

• Web Application Security Questionnaire
• Security & Privacy Program Questionnaire
• Infrastructure Security Questionnaire
• Physical & Data Center Security Questionnaire

Source: Google Online Security Blog: Scalable vendor security reviews