PT-2026-27321 · Src+3 · Src+3

Titan Team · Published 2026-03-24 · Updated 2026-03-25 · CVE-2026-4744

Positive Technologies (AI Summary)

CVSS v4.0

9.3

Critical

Base vector

AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:A/S:N/AU:N/R:U/V:D/RE:L/U:Amber

Name of the Vulnerable Software and Affected Versions Notepad3 versions prior to 6.25.714.1

Description An out-of-bounds read issue exists in the rizonesoft Notepad3 application, specifically within the scintilla, oniguruma, and src modules. The issue is related to the regcomp.C program file. This is a parser vulnerability where malicious regular expressions can lead to remote code execution.

Recommendations Update Notepad3 to version 6.25.714.1 or later.

Fix

RCE

Out of bounds Read

Weakness Enumeration

CWE-125

Related Identifiers

CVE-2026-4744

Affected Products

Notepad3

Oniguruma

Scintilla

Src

References · 4

• https://github.com/rizonesoft/Notepad3/pull/5392 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-4744 · Security Note
• https://twitter.com/0dayPublishing/status/2036286707096539325 · Twitter Post
• https://twitter.com/CVEarity/status/2036847052936868278 · Twitter Post