CVE-2023-40166— Notepad++ heap buffer read overflow in FileManager::detectLanguageFromTextBegining
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I. Basic Information for CVE-2023-40166
Vulnerability Information
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Vulnerability Title
Notepad++ heap buffer read overflow in FileManager::detectLanguageFromTextBegining
Source: NVD (National Vulnerability Database)
Vulnerability Description
Notepad++ is a free and open-source source code editor. Versions 8.5.6 and prior are vulnerable to heap buffer read overflow in `FileManager::detectLanguageFromTextBegining `. The exploitability of this issue is not clear. Potentially, it may be used to leak internal memory allocation information. As of time of publication, no known patches are available in existing versions of Notepad++.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
未进行输入大小检查的缓冲区拷贝(传统缓冲区溢出)
Source: NVD (National Vulnerability Database)
Vulnerability Title
Notepad++ 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Notepad++是中国台湾侯今吾（Don Ho）个人开发者的一款开源的纯文本编辑器。 Notepad++ 存在安全漏洞，该漏洞源于在FileManager::detectLanguageFromTextBegining函数中存在堆缓冲区读取溢出漏洞。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| notepad-plus-plus | notepad-plus-plus | <= 8.5.6 | - |
II. Public POCs for CVE-2023-40166
| # | POC Description | Source Link | Shenlong Link |
|---|
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- https://securitylab.github.com/advisories/GHSL-2023-092_Notepad__/x_refsource_CONFIRM
- https://nvd.nist.gov/vuln/detail/CVE-2023-40166
Same Patch Batch · notepad-plus-plus · 2023-08-25 · 4 CVEs total
| CVE-2023-40031 | 7.8 HIGH | Notepad++ vulnerable to heap buffer write overflow in Utf8_16_Read::convert |
| CVE-2023-40164 | 5.5 MEDIUM | Notepad++ global buffer read overflow in nsCodingStateMachine::NextState |
| CVE-2023-40036 | 5.5 MEDIUM | Notepad++ global buffer read overflow in CharDistributionAnalysis::HandleOneChar |
IV. Related Vulnerabilities
Same product: notepad-plus-plus
- CVE-2026-25926
Notepad++ has an Untrusted Search Path - CVE-2025-15556
Notepad++ < 8.8.9 WinGUp Updater Lacks Update Integrity Veri - CVE-2025-49144
Notepad++ Privilege Escalation in Installer via Uncontrolled - CVE-2023-40164
Notepad++ global buffer read overflow in nsCodingStateMachin - CVE-2023-40036
Notepad++ global buffer read overflow in CharDistributionAna
Same vendor: notepad-plus-plus
- CVE-2026-25926
Notepad++ has an Untrusted Search Path - CVE-2025-15556
Notepad++ < 8.8.9 WinGUp Updater Lacks Update Integrity Veri - CVE-2025-49144
Notepad++ Privilege Escalation in Installer via Uncontrolled - CVE-2023-40164
Notepad++ global buffer read overflow in nsCodingStateMachin - CVE-2023-40036
Notepad++ global buffer read overflow in CharDistributionAna
Same weakness: CWE-120
- CVE-2026-8260
D-Link DCS-935L HNAP Service hnap_service SetDeviceSettings - CVE-2026-8137
Totolink X5000R formDdns sub_458E40 buffer overflow - CVE-2026-6691
MongoDB C Driver Cyrus SASL Canonicalization Buffer Overflow - CVE-2026-7857
D-Link DI-8100 CGI user_group.asp sprintf buffer overflow - CVE-2026-7856
D-Link DI-8100 Web Management url_member.asp buffer overflow
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