Welcome to Source Code: Decipher’s behind the scenes look at the weekly news with input from our sources. The Log4j flaw - and its impact on millions of third-party applications and services - dominated this week's security news, with researchers pointing to challenges in deploying fixes and exploitation attempts from nation-state actors. Also this week, Microsoft issued its Patch Tuesday security updates, which included a fix for a flaw that was being exploited in Emotet malware attacks.