The text provides a detailed analysis of the Log4Shell vulnerability in the Log4j Java logging library, identified as CVE-2021-44228, which allows remote code execution and full system control by attackers. Disclosed in December 2021, the vulnerability was introduced in 2013 and exploited as a zero-day in the wild before public awareness. The document outlines the timeline of discovery, methods for identifying and securing vulnerable systems, and remediation strategies, including upgrading to Log4j version 2.16+. It elaborates on the exploit chain, highlighting how attackers use the Java Naming and Directory Interface (JNDI) to compromise applications. Datadog's Security Platform is discussed as a tool for detecting and preventing such exploits, with capabilities to identify attack payloads and monitor for suspicious activities. Real-world exploitation attempts observed by Datadog, such as those involving the Kinsing malware, are described to illustrate the threat's prevalence and the importance of a defense-in-depth security strategy.