Log4j, a popular Java logging library, was found to have a critical vulnerability (CVE-2021-44228) that allows remote code execution, prompting widespread concern as it affects numerous services and applications. The Apache Software Foundation released updates to address the flaw, alongside two additional vulnerabilities (CVE-2021-45046 and CVE-2021-45105) that could lead to Denial of Service attacks. LambdaTest responded by auditing its systems, confirming no customer data exposure, and patching all Java-based applications using Log4j. They also collaborated with vendors, monitored for potential attacks, and implemented security best practices. The mitigation steps include updating to Log4j version 2.16.0, disabling JNDI lookups, using a Web Application Firewall (WAF), and deploying vulnerability scanners. LambdaTest continues to monitor the situation closely and advises customers to stay informed through their support channels.