Closing loopholes that could allow unauthorized users to see sensitive project data.
This is non-negotiable. Ensure you have a consistent set of backups for all Azure DevOps/TFS databases. TFS-Update_4a-pc.zip
Security First: Managing the TFS 2015 Update 4 Patch (TFS-Update_4a-pc.zip) Closing loopholes that could allow unauthorized users to
TFS 2015 Update 4 has been a stable "long-tail" version for many enterprises. However, older software is a prime target for vulnerabilities. Microsoft has released several patches—often referred to in documentation as or Update 4.2 —specifically to fix: TFS-Update_4a-pc.zip