CVE-2025-56383 json
Notepad++ v8.8.3 has a DLL hijacking vulnerability, which can replace the original DLL file to execute malicious code.
published 2025-09-26 13 mo ago modified 2026-11-05 3 d ago also EUVD-2025-31376
- cvss
- 8.4
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 32%
- public exploits
- 0
- none known
Summary
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.
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- total
- Assessed
- 13 mo ago
Exploit prediction
0.38% chance of exploitation in the next 30 days, higher than 32% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CISA ADP | 3.1 | 8.4 | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| CNA | 3.1 | 8.4 | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Classification
- Weakness
-
- CWE-427 Uncontrolled Search Path Element
References
- github.com /notepad-plus-plus/notepad-plus-plus
- github.com /zer0t0/CVE-2025-56383-Proof-of-Concept
- github.com /zer0t0/CVE-2025-56383-Proof-of-Concept/issues/1
- vicarius.io /vsociety/posts/cve-2025-56383-detect-notepad-vulnerability
- vicarius.io /vsociety/posts/cve-2025-56383-mitigate-notepad-vulnerability
Sources
- CVE List CVE-2025-56383
- NVD CVE-2025-56383
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.