Heap-based buffer overflow in Notepad++ - #VU137483
Published: September 8, 2023 / Updated: July 14, 2026
Vulnerability identifier: #VU137483
CSH Severity: High
CVSS v4: 8.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-122
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to execute arbitrary code.
The vulnerability exists due to heap-based buffer overflow in Utf8_16_Read::convert when opening a crafted file. A remote attacker can trick the victim into opening a crafted file to execute arbitrary code.
User interaction is required to open a crafted file.
Affected software
Notepad++
Remediation
Install security update from vendor's website.
Notepad++ - update to 8.5.7