# CVE-2023-40031

> Notepad++ is a free and open-source source code editor. Versions 8.5.6 and prior are vulnerable to heap buffer write overflow in `Utf8_16_Read::convert`. This issue may lead to arbitrary code execution. As of time of publication, no known patches are available in existing versions of Notepad++.

- **CVSS:** 7.8 (HIGH)
- **EPSS:** 0.4%
- **CWE:** CWE-120, CWE-122

Canonical: https://intel.threadlinqs.com/cve/CVE-2023-40031
Full threat coverage + IOCs via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp