Vendor
notepad-plus-plus
25 known vulnerabilities.
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High 7.3
Notepad++: Authenticode verification bypass allows modified updater execution
Notepad++ is a free and open-source source code editor. From 8.9.7 until 8.9.8, the Notepad++ updater and signature verification path can accept a modified GUP.exe file whose embedded certificate metadata remains present even though its Authenticode digest is…
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High 7.8
Notepad++ “Run by system” executes *.txt.cmd when user selected *.txt (target confusion → command execution)
Notepad++ is a free and open-source source code editor. Prior to 8.9.8, the Folder as Workspace Run by system action in Notepad++ can resolve a different sibling file than the file selected by the user. When an attacker places a command script whose name is t…
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High 7.8
Notepad++: Stack Buffer Overflow in `NppParameters::writeSession` via overlong session path
Notepad++ is a free and open-source source code editor. Prior to 8.9.8, Notepad++ contains a stack buffer overflow in NppParameters::writeSession in PowerEditor/src/Parameters.cpp because it copies a session path derived from -settingsDir= into backupPathName…
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High 8.6
Notepad++: Stack Buffer Overflow in Plugin Lexer Loading via Unchecked GetLexerCount() Return Value
Notepad++ is a free and open-source source code editor. Prior to 8.9.8, Notepad++ contains a stack buffer overflow in PluginsManager::loadPluginFromPath in PowerEditor/src/MISC/PluginsManager/PluginsManager.cpp because the plugin-supplied GetLexerCount() resu…
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High 8.1
Notepad++: Path Traversal (Zip Slip) in WinGup Plugin Extraction
Notepad++ is a free and open-source source code editor. Prior to 8.9.7, the WinGup decompress function joins untrusted ZIP entry names to unzipDestTo without canonical containment validation, allowing an entry such as ../mimeTools/mimeTools.dll to overwrite a…
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High 7.8
Notepad++: Stack Buffer Overflow in expandNppEnvironmentStrs
Notepad++ is a free and open-source source code editor. Prior to 8.9.7, the expandNppEnvironmentStrs function in PowerEditor/src/WinControls/StaticDialog/RunDlg/RunDlg.cpp copies a Notepad++ variable name between $( and ) into the fixed-size wchar_t str[MAX_P…
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High 7.8CVE-2026-48778 Public exploit
Notepad++: Arbitrary Code Execution via config.xml commandLineInterpreter
Notepad++ is a free and open-source source code editor. Prior to 8.9.6.1, the <GUIConfig name="commandLineInterpreter"> tag in config.xml is read by NppXml::value() (Parameters.cpp:6430) and stored in _nppGUI._commandLineInterpreter without any validation, wh…
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High 7.5CVE-2026-52885 Public exploit
Notepad++ TOCTOU: HMAC Checks Disk, Executes from Memory
Notepad++ is a free and open-source source code editor. Prior to 8.9.6.4, NppCommands.cpp checks the HMAC of the on-disk shortcuts.xml at the moment a user command fires (Time-of-Check). However, the command payload is taken from the in-memory _userCommands v…
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High 7.5
Notepad++: Privilege Escalation in the Installer via Uncontrolled Executable Search Path
Notepad++ is a free and open-source source code editor. From 8.9.4 until 8.9.6, Notepad++ contains a local privilege escalation vulnerability in the installer. During installation, the installer invokes powershell.exe without using an absolute path after sett…
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High 7.8CVE-2026-48800 Public exploit
Notepad++: Arbitrary Code Execution via shortcuts.xml UserCommand Injection
Notepad++ is a free and open-source source code editor. Prior to 8.9.6.1, the <Command> tag text content inside <UserDefinedCommands> in shortcuts.xml is read by NppXml::value(aNode) (Parameters.cpp:3658) in the feedUserCmds() function and stored in UserComma…
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High 7.8
Notepad++: CVE-2026-48800 Bypass
Notepad++ is a free and open-source source code editor. In v8.9.6.1, isInTrustedDirectory() does NOT canonicalize the path before checking. It uses a prefix-based check (PathIsPrefix() or equivalent) that matches paths starting with trusted directory strings.…
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High 7.3
Notepad++ has an Untrusted Search Path
Notepad++ is a free and open-source source code editor. An Unsafe Search Path vulnerability (CWE-426) exists in versions prior to 8.9.2 when launching Windows Explorer without an absolute executable path. This may allow execution of a malicious explorer.exe i…
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High 7.7
Notepad++ < 8.8.9 WinGUp Updater Lacks Update Integrity Verification
Notepad++ versions prior to 8.8.9, when using the WinGUp updater, contain an update integrity verification vulnerability where downloaded update metadata and installers are not cryptographically verified. An attacker able to intercept or redirect update traff…
KEV Feb 12, 2026 -
High 7.3CVE-2025-49144 Public exploit
Notepad++ Privilege Escalation in Installer via Uncontrolled Executable Search Path
Notepad++ is a free and open-source source code editor. In versions 8.8.1 and prior, a privilege escalation vulnerability exists in the Notepad++ v8.8.1 installer that allows unprivileged users to gain SYSTEM-level privileges through insecure executable searc…
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High 7.8CVE-2023-40031 Public exploit
Notepad++ vulnerable to heap buffer write overflow in Utf8_16_Read::convert
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 availabl…
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High 7.8
notepad-plus-plus - DLL Hijacking
Notepad++ versions 8.4.1 and before are vulnerable to DLL hijacking where an attacker can replace the vulnerable dll (UxTheme.dll) with his own dll and run arbitrary code in the context of Notepad++.