Microsoft has added protection against Server Message Block (SMB) critical zero-day vulnerability, available ot customers running the Forefront TMG Network Inspection System. “In a matter of hours we completed root-cause analysis, signature development, testing and publishing of a new signature snapshot. During this process, which is driven by the Microsoft Malware Protection Center (MMPC), the team was able to demonstrate the agility of the core NIS technology and exercise the technologies and tools built over time to release a signature for the Vuln:Win/SMB2.Srv2.DoS!2009-3103 vulnerability in just a few hours,” revealed.