{"id":"CVE-2023-40031","aliases":["EUVD-2023-44642"],"status":"published","title":"Notepad++ vulnerable to heap buffer write overflow in Utf8_16_Read::convert","description":"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++.","severity":{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00517,"percentile":0.44455,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":false},"cwes":["CWE-120","CWE-122"],"published":"2023-08-25T19:49:23Z","modified":"2026-10-28T02:30:29Z","exploits":[{"source":"pocgithub","id":"webraybtl/CVE-2023-40031","title":"webraybtl/CVE-2023-40031","date":"2023-09-08","url":"https://github.com/webraybtl/CVE-2023-40031"}],"products":[{"vendor":"notepad-plus-plus","product":"notepad-plus-plus"},{"vendor":"notepad-plus-plus","product":"notepad\\+\\+"}],"references":[{"url":"https://securitylab.github.com/advisories/GHSL-2023-092_Notepad__/","tags":["x_refsource_CONFIRM","x_transferred","Exploit","Third Party Advisory","advisory"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/40xxx/CVE-2023-40031.json","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-40031","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2023-40031","title":"Notepad++ vulnerable to heap buffer write overflow in Utf8_16_Read::convert","description":"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++.","status":"published","published":"2023-08-25T19:49:23.433Z","modified":"2024-10-02T14:53:13.209Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-120","CWE-122"],"updated_at":"2026-11-02T14:35:21.971258Z"}],"euvd":[{"id":"EUVD-2023-44642","description":"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++.","status":"published","published":"2023-08-25T19:49:23Z","modified":"2024-10-02T14:53:13Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-03T00:27:58.959241Z"}],"nvd":[{"id":"CVE-2023-40031","description":"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++.","status":"published","published":"2023-08-25T20:15:08.517Z","modified":"2026-06-17T06:15:50.78Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"},{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"}],"cwes":["CWE-120","CWE-122"],"updated_at":"2026-11-02T14:08:25.025396Z"}],"osv":[{"id":"CVE-2023-40031","title":"Notepad++ vulnerable to heap buffer write overflow in Utf8_16_Read::convert","description":"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++.","status":"published","published":"2023-08-25T19:49:23.433Z","modified":"2026-10-28T02:30:29.032731916Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-120","CWE-122"],"updated_at":"2026-11-02T15:44:33.244128Z"}]}}