Log4Shell (CVE-2021-44228) is a vulnerability reported in November 2021 in Log4j, a popular Java logging framework, involving arbitrary code execution and exploited as a zero-day vulnerability. [2][3] …

Log4Shell, also known as the Log4j vulnerability, is a remote code execution (RCE) vulnerability in some versions of the Apache Log4j 2 Java library. Log4Shell allows hackers to run virtually any code they …

Log4Shell is a critical zero-day vulnerability (CVE-2021-44228) in Log4j that was uncovered in December 2021. It allows attackers to execute arbitrary code remotely on affected systems.

Oct 20, 2025 · The Log4Shell incident showed us how quickly our digital world can be threatened by a single vulnerability. But it also demonstrated the power of the open source community to respond, …

Mar 2, 2023 · Log4Shell is a software vulnerability in Apache Log4j 2, a popular Java library for logging error messages in applications. The vulnerability, published as CVE-2021-44228, enables a remote …

Nov 25, 2025 · The Log4Shell vulnerability is a remote code execution (RCE) vulnerability found in the Apache Log4j 2 logging library. As Apache Log4j 2 is commonly used by many software applications …

Dec 23, 2021 · Log4Shell, disclosed on December 10, 2021, is a remote code execution (RCE) vulnerability affecting Apache’s Log4j library, versions 2.0-beta9 to 2.14.1. The vulnerability exists in …

Mar 19, 2025 · Log4Shell is a critical Remote Code Execution (RCE) vulnerability in the Apache Log4j logging framework. It went unnoticed for nearly eight years, since 2013, before its public disclosure in …

You have taken your first step into learning what Log4j vulnerability aka Log4Shell is, how it works, what the impacts are, and how to protect your own applications.

Jul 17, 2025 · CVE-2021-44228, dubbed Log4Shell, is a remote code execution (RCE) vulnerability in Apache Log4j 2.x (specifically, log4j-core versions 2.0-beta9 through 2.14.1). The flaw resides in …