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CVE-2025-56383

8.4 · HIGH

Notepad++ v8.8.3 has a DLL hijacking vulnerability, which can replace the original DLL file to execute malicious code.

Published Sep 26, 2025CWE-427EPSS 0.38%

Overview

CVE-2025-56383 is a high-severity vulnerability. It was published on September 26, 2025 and has a CVSS 3.1 base score of 8.4 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.4, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

Technical description

Notepad++ v8.8.3 has a DLL hijacking vulnerability, which can replace the original DLL file to execute malicious code. NOTE: this is disputed by multiple parties because the behavior only occurs when a user installs the product into a directory tree that allows write access by arbitrary unprivileged users.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/notepad-plus-plus/notepad-plus-plusGitHubgithub.com/zer0t0/CVE-2025-56383-Proof-of-ConceptGitHubgithub.com/zer0t0/CVE-2025-56383-Proof-of-Concept/issues/1Refwww.vicarius.io/vsociety/posts/cve-2025-56383-detect-notepad-vulnerabilityRefwww.vicarius.io/vsociety/posts/cve-2025-56383-mitigate-notepad-vulnerability

How CyberStrike helps

Frequently asked questions

What is CVE-2025-56383?

CVE-2025-56383 is a high-severity vulnerability. It was published on September 26, 2025 and has a CVSS 3.1 base score of 8.4 (HIGH).

How severe is CVE-2025-56383?

This vulnerability has a CVSS 3.1 base score of 8.4, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2025-56383?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2025-56383?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2025-56383 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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