Notepad
CVE-2023-40031
HIGH
Severity by source
AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
Lifecycle Timeline
1DescriptionNVD
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++.
AnalysisAI
Notepad++ is a free and open-source source code editor. Rated high severity (CVSS 7.8), this vulnerability is no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
Technical ContextAI
This vulnerability is classified as Buffer Copy without Size Check (CWE-120), which allows attackers to overflow a buffer to corrupt adjacent memory. 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++. Affected products include: Notepad-Plus-Plus Notepad\+\+.
RemediationAI
No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Always validate buffer sizes before copy operations. Use bounded functions (strncpy, snprintf). Enable compiler protections.
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Notepad++ is a free and open-source source code editor. Rated medium severity (CVSS 5.5), this vulnerability is no authe
Notepad++ is a free and open-source source code editor. Rated medium severity (CVSS 5.5), this vulnerability is no authe
Same weakness CWE-120 – Classic Buffer Overflow
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External POC / Exploit Code
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