CVE-2025-56383

HIGH

Notepad++ v8.8.3 - Code Injection

Title source: llm

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.

Exploits (1)

nomisec WORKING POC 55 stars

by zer0t0 · poc

https://github.com/zer0t0/CVE-2025-56383-Proof-of-Concept

View Code ZIP pw:eip

References (5)

[Various Sources] https://github.com/notepad-plus-plus/notepad-plus-plus

[Various Sources] https://github.com/zer0t0/CVE-2025-56383-Proof-of-Concept

[Third Party Advisory] https://www.vicarius.io/vsociety/posts/cve-2025-56383-detect-notepad-vulnerability

[Third Party Advisory] https://www.vicarius.io/vsociety/posts/cve-2025-56383-mitigate-notepad-vulnerability

[Issue Tracking] https://github.com/zer0t0/CVE-2025-56383-Proof-of-Concept/issues/1

Scores

CVSS v3 8.4

EPSS 0.0003

EPSS Percentile 7.5%

Attack Vector LOCAL

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment

Exploitation poc

Automatable no

Technical Impact total

Details

CWE

CWE-427

Status published

Published Sep 26, 2025

Tracked Since Feb 18, 2026