DLL Hijacking Vulnerability in Notepad++ Software by Notepad++ Team

CVE-2025-56383

What is CVE-2025-56383?

CVE-2025-56383 is a DLL hijacking vulnerability identified in version 8.8.3 of Notepad++, a widely used open-source text and source code editor. Notepad++ is particularly favored by developers for its lightweight design and extensive feature set, including syntax highlighting, macro support, and plugin functionality. The DLL hijacking vulnerability allows an attacker to replace a legitimate dynamic link library (DLL) with a malicious version, enabling unauthorized execution of code when the vulnerable application is launched. This could lead to significant risks for organizations, as compromised Notepad++ installations may execute harmful payloads, potentially granting attackers increased access to systems and sensitive information.

Potential impact of CVE-2025-56383

1. Unauthorized Code Execution: The primary impact of this vulnerability is the potential for attackers to execute arbitrary code on systems where Notepad++ is installed. This level of access can lead to a variety of malicious outcomes, including data theft, sabotage, or the deployment of additional malware.

2. Compromise of Sensitive Data: Given that Notepad++ is commonly used in software development and text editing, exploiting this vulnerability may grant attackers access to source code or sensitive configuration files. Such access can lead to data breaches or unauthorized disclosure of proprietary information.

3. Wider Network Penetration: Successful exploitation of CVE-2025-56383 could serve as a foothold for attackers to pivot to other systems within an organization’s network. If attackers can execute code on a single machine, they may gain the ability to spread laterally, impacting additional devices and resources.

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