CVE-2026-54758

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 wchart strMAXPATH stack buffer without bounding the m loop...

CVE-2026-73250

Notepad++ is a free and open-source source code editor. Prior to 8.9.7, the Notepad++ Windows 11 x64 and ARM64 installer passes the attacker-influenced installation directory $INSTDIR from PowerEditor/installer/nppSetup.nsi into a PowerShell -Command string used by RegisterMSIX to invoke...

EUVD-2026-57017

Notepad++ is a free and open-source source code editor. Prior to 8.9.7, the Notepad++ Windows 11 x64 and ARM64 installer passes the attacker-influenced installation directory $INSTDIR from PowerEditor/installer/nppSetup.nsi into a PowerShell -Command string used by RegisterMSIX to invoke...

CVE-2026-73250 Notepad++: Install-time PowerShell command injection through installation path

Notepad++ is a free and open-source source code editor. Prior to 8.9.7, the Notepad++ Windows 11 x64 and ARM64 installer passes the attacker-influenced installation directory $INSTDIR from PowerEditor/installer/nppSetup.nsi into a PowerShell -Command string used by RegisterMSIX to invoke...

CVE-2026-73250

Notepad++ is a free and open-source source code editor. Prior to 8.9.7, the Notepad++ Windows 11 x64 and ARM64 installer passes the attacker-influenced installation directory $INSTDIR from PowerEditor/installer/nppSetup.nsi into a PowerShell -Command string used by RegisterMSIX to invoke...

CVE-2026-73250 Notepad++: Install-time PowerShell command injection through installation path

Notepad++ is a free and open-source source code editor. Prior to 8.9.7, the Notepad++ Windows 11 x64 and ARM64 installer passes the attacker-influenced installation directory $INSTDIR from PowerEditor/installer/nppSetup.nsi into a PowerShell -Command string used by RegisterMSIX to invoke...

CVE-2026-73250

Notepad++ prior to 8.9.7 on Windows 11 x64/ARM64: the installer passes the attacker-controlled installation directory into a PowerShell -Command string used by RegisterMSIX to invoke Add-AppxPackage, enabling PowerShell subexpression syntax (e.g., $()) in the path to execute commands in the insta...

PT-2026-70941

Name of the Vulnerable Software and Affected Versions Notepad++ versions prior to 8.9.7 Description The Windows 11 x64 and ARM64 installer for this source code editor contains a command injection flaw. The installer passes the installation directory variable $INSTDIR from...

Fake Notepad++ Plugin Delivers MATCHBOIL.V2 in UAC-0099 Attacks

The Computer Emergency Response Team of Ukraine CERT-UA has warned of a new campaign that involves the use of a malicious program that's dressed up as a Notepad++ plugin to compromise Windows systems. The activity has been attributed by the agency to a threat cluster it tracks as UAC-0099 , a...

Notepad++ < 8.9.7 Multiple Vulnerabilities

The version of Notepad++ installed on the remote host is prior to 8.9.7. It is, therefore, affected by multiple vulnerabilities: - A security bypass vulnerability exists in session.xml backupFilePath handling due to an incomplete startswith check. An attacker could exploit this to bypass path...

PT-2026-58886

Notepad++ is a free and open-source source code editor. Prior to 8.9.7, Notepad++ validates the backupFilePath attribute from session.xml with std::wstring::starts with against the expected backup directory without path normalization, allowing parent-directory sequences during snapshot-mode...

PT-2026-58888

Name of the Vulnerable Software and Affected Versions Notepad++ versions prior to 8.9.7 Description The WinGup decompress function fails to perform canonical containment validation when joining untrusted ZIP entry names to unzipDestTo. This allows a specially crafted ZIP entry, such as...

PT-2026-58887

Name of the Vulnerable Software and Affected Versions Notepad++ versions prior to 8.9.7 Description The expandNppEnvironmentStrs function in PowerEditor/src/WinControls/StaticDialog/RunDlg/RunDlg.cpp copies a variable name located between $ and into a fixed-size wchar t strMAX PATH stack buffer...

MAL-2026-7329 Malicious code in notepad-monorepo (npm)

--- -= Per source details. Do not edit below this line.=-...

MAL-2026-7328 Malicious code in notepad-frontend (npm)

--- -= Per source details. Do not edit below this line.=-...

Notepad++ 8.9.6.2 < 8.9.6.4 TOCTOU Race Condition (CVE-2026-52885)

The version of Notepad++ installed on the remote host is 8.9.6.2 or 8.9.6.3. It is, therefore, affected by a TOCTOU race condition vulnerability: - A time-of-check time-of-use TOCTOU race condition exists in the HMAC verification of shortcuts.xml. The HMAC check validates the on-disk file at...

CVE-2026-38972

Notepad3 versions up to 6.25.822.1 are vulnerable to a DLL search-order hijack in the About-dialog code path (src/Notepad3.c). The application loads MSFTEDIT.DLL via LoadLibrary with a bare DLL name, enabling a local attacker to place a malicious MSFTEDIT.DLL in the application directory or anoth...

CVE-2026-38972

Notepad3 through 6.25.822.1 contains a DLL search-order hijacking vulnerability in the About-dialog code path in src/Notepad3.c. The application calls LoadLibraryL"MSFTEDIT.DLL" with a bare DLL name, which allows a local attacker to place a malicious MSFTEDIT.DLL in the application directory or...

CVE-2026-38972

Notepad3 through 6.25.822.1 contains a DLL search-order hijacking vulnerability in the About-dialog code path in src/Notepad3.c. The application calls LoadLibraryL"MSFTEDIT.DLL" with a bare DLL name, which allows a local attacker to place a malicious MSFTEDIT.DLL in the application directory or...

PT-2026-55312

Name of the Vulnerable Software and Affected Versions Notepad3 versions prior to 6.25.822.2 Description A DLL search-order hijacking issue exists in the About-dialog code path within src/Notepad3.c. The application uses the LoadLibrary function to load MSFTEDIT.DLL using a bare name. This allows ...