CVE-2026-57233

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 DLL in a sibling plugin directory and...

CVE-2026-57233 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 DLL in a sibling plugin directory and...

CVE-2026-57233

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 DLL in a sibling plugin directory and...

CVE-2026-57233 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 DLL in a sibling plugin directory and...

CVE-2026-57233

In Notepad++ prior to 8.9.7, the WinGup decompress function joins untrusted ZIP entry names to the extraction destination without canonical containment validation, enabling a Zip Slip attack. A crafted entry like ../mimeTools/mimeTools.dll overwrites a sibling plugin DLL, achieving arbitrary code...

Notepad++ Fixes Hijacked Update Mechanism Used to Deliver Targeted Malware

Notepad++ has released a security fix to plug gaps that were exploited by an advanced threat actor from China to hijack the software update mechanism to selectively deliver malware to targets of interest. The version 8.9.2 update incorporates what maintainer Don Ho calls a "double lock" design th...

CVE-2025-15556

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 traffic can cause the updater to download a...

Notepad++ < 8.8.9 Update Integrity Verification Vulnerability

Notepad++ versions prior to 8.8.9, when using the WinGUp updater, contain a vulnerability where downloaded update metadata and installers are not cryptographically verified. An attacker able to intercept or redirect update traffic can cause the updater to download and execute an attacker-controll...

CVE-2025-15556

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 traffic can cause the updater to download a...

EUVD-2025-206661

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 traffic can cause the updater to download a...

CVE-2025-15556

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 traffic can cause the updater to download a...

CVE-2025-15556 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 traffic can cause the updater to download a...

CVE-2025-15556 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 traffic can cause the updater to download a...

CVE-2025-15556 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 traffic can cause the updater to download a...

CVE-2025-15556

Notepad++ versions prior to 8.8.9 using the WinGUp updater are affected by an update integrity verification vulnerability: downloaded update metadata and installers are not cryptographically verified. An attacker who can intercept or redirect update traffic can cause the updater to download and e...

Notepad++ 安全漏洞

Notepad++ is an open-source plain-text editor developed by Don Ho of Taiwan, China. Versions of Notepad++ prior to 8.8.9 contained security vulnerabilities. These vulnerabilities stemmed from insufficient integrity verification during updates using the WinGUp updater, which could allow arbitrary...

VulnCheck KEV: CVE-2025-15556

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 traffic can cause the updater to download a...

Notepad++ DLL WinGUp Update Hijacking Vulnerability (Dec 2025)

Notepad++ is prone to a WinGUp update hijacking vulnerability. SPDX-FileCopyrightText: 2025 Greenbone AG Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-only CPE =...

PT-2026-5735

Name of the Vulnerable Software and Affected Versions Notepad++ versions prior to 8.8.9 Description The Notepad++ WinGUp updater has a flaw in how it verifies the integrity of updates. This allows an attacker who can intercept or redirect update traffic to cause the updater to download and execut...