CVE-2023-40166: medium-severity vulnerability in notepad-plus-plus
Notepad++ heap buffer read overflow in FileManager::detectLanguageFromTextBegining
Published · Updated
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 5.5epss 0.4%
Notepad++ is a free and open-source source code editor. Versions 8.5.6 and prior are vulnerable to heap buffer read overflow in `FileManager::detectLanguageFromTextBegining `. The exploitability of this issue is not clear. Potentially, it may be used to leak internal memory allocation information. As of time of publication, no known patches are available in existing versions of Notepad++.
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Affected products
notepad-plus-plus · notepad-plus-plusRelated CVEs — notepad-plus-plus
In the same product, most dangerous first.
CVE-2025-15556HIGHNotepad++ < 8.8.9 WinGUp Updater Lacks Update Integrity VerificationEPSS 1.7%KEVCVE-2022-32168HIGHnotepad-plus-plus - DLL HijackingEPSS 0.8%CVE-2025-49144HIGHNotepad++ Privilege Escalation in Installer via Uncontrolled Executable Search PathEPSS 0.7%CVE-2026-48778HIGHNotepad++: Arbitrary Code Execution via config.xml commandLineInterpreterEPSS 0.6%CVE-2023-40031HIGHNotepad++ vulnerable to heap buffer write overflow in Utf8_16_Read::convertEPSS 0.5%CVE-2026-57233HIGHNotepad++: Path Traversal (Zip Slip) in WinGup Plugin ExtractionEPSS 0.5%