CVE-2026-4744: Rizonesoft NOTEPAD3

Critical severity, CVSS 9.3. EPSS: 0.2% chance of exploitation in the next 30 days.

Out-of-bounds Read vulnerability in rizonesoft Notepad3 (‎scintilla/oniguruma/src modules). This vulnerability is associated with program files regcomp.C‎. This issue affects Notepad3: before 6.25.714.1.

Affected products

• Rizonesoft NOTEPAD3

Published 2026-03-24. Last modified 2026-06-17.