Microsoft Exchange Zero-Day, Linux Kernel LPE, and an Open-Source Docker Scanner Today's Highlights This week, urgent patches are required for a critical Microsoft Exchange zero-day and a new Linux kernel privilege escalation flaw, 'Fragnesia,' with a PoC. In more practical news, a new open-source Docker security scanner offers a quick way to audit web applications and container hosts. Microsoft Warns of Exchange Zero-Day Flaw Exploited in Attacks (r/cybersecurity) Source: https://reddit.com/r/cybersecurity/comments/1tdvn3p/microsoft_warns_of_exchange_zeroday_flaw/ A severe zero-day vulnerability affecting Microsoft Exchange Server has been reported, with evidence of active exploitation in the wild. This critical flaw poses a significant threat to organizations utilizing on-premise Exchange deployments, potentially enabling attackers to achieve unauthorized access, execute arbitrary code, or compromise sensitive data.…