CVE-2026-5525

A stack-based buffer overflow vulnerability exists in Notepad++ version 8.9.3 in the file drop handler component. When a user drags and drops a directory path of exactly 259 characters without a trailing backslash, the application appends a backslash and null terminator without proper bounds...

CVE-2026-5525 Stack-Based Buffer Overflow in Notepad++ File Drop Handler leads to DoS

A stack-based buffer overflow vulnerability exists in Notepad++ version 8.9.3 in the file drop handler component. When a user drags and drops a directory path of exactly 259 characters without a trailing backslash, the application appends a backslash and null terminator without proper bounds...

Notepad++ 安全漏洞

Notepad++ is an open-source plain-text editor developed by Don Ho of Taiwan, China. Version 8.9.3 of Notepad++ contains a security vulnerability. This vulnerability arises from the file drag-and-drop processing component, which may add slashes and empty terminators when users drag a directory pat...

PT-2026-31894

Name of the Vulnerable Software and Affected Versions Notepad++ version 8.9.3 Description A stack-based buffer overflow exists in the file drop handler component. When a user drags and drops a directory path of exactly 259 characters without a trailing backslash, the application appends a backsla...

Notepad++ < 8.9.3 libcurl TLS CA Store Caching (CVE-2025-14819)

The version of Notepad++ installed on the remote host is prior to 8.9.3. It is, therefore, affected by a vulnerability: - A flaw exists in the bundled libcurl library used by WinGUp, the Notepad++ updater. When doing TLS related transfers with reused easy or multi handles and altering the...

EUVD-2026-10342

MobaXterm versions prior to 26.1 contain an uncontrolled search path element vulnerability. The application calls WinExec to execute Notepad++ without a fully qualified executable path when opening remote files. An attacker can exploit the search path behavior by placing a malicious executable...

CVE-2026-25866

MobaXterm versions prior to 26.1 contain an uncontrolled search path element vulnerability. The application calls WinExec to execute Notepad++ without a fully qualified executable path when opening remote files. An attacker can exploit the search path behavior by placing a malicious executable...

CVE-2026-25926

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 if an attacker can control the process...

Notepad++ < 8.9.2 Unsafe Search Path (GHSA-rjvm-fcxw-2jxq)

The version of Notepad++ installed on the remote host is prior to 8.9.2. It is, therefore, affected by a vulnerability: - An Unsafe Search Path vulnerability CWE-426 exists when launching Windows Explorer without an absolute executable path. This may allow execution of a malicious explorer.exe if...

CVE-2026-25926

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 if an attacker can control the process...

CVE-2026-25926 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 if an attacker can control the process...

CVE-2026-25926 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 if an attacker can control the process...

CVE-2026-25926 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 if an attacker can control the process...

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...

PT-2026-20553

Name of the Vulnerable Software and Affected Versions Notepad++ versions prior to 8.9.2 Description Notepad++ is a free and open-source source code editor. An Unsafe Search Path issue CWE-426 exists when launching Windows Explorer without an absolute executable path. This could allow execution of...

Notepad++ Download of Code Without Integrity Check Vulnerability

Notepad++ when using the WinGUp updater, contains a download of code without integrity check vulnerability that could allow an attacker to intercept or redirect update traffic to download and execute an attacker-controlled installer. This could lead to arbitrary code execution with the privileges...

Chrysalis, Notepad++, and Supply Chain Risk: What it Means, and What to Do Next

When Rapid7 published its analysis of the Chrysalis backdoor linked to a compromise of Notepad++ update infrastructure, it raised understandable questions from customers and security teams. The investigation showed that attackers did not exploit a flaw in the application itself. Instead, they...

Backdoor in Notepad++

Hackers associated with the Chinese government used a Trojaned version of Notepad++ to deliver malware to selected users. Notepad++ said that officials with the unnamed provider hosting the update infrastructure consulted with incident responders and found that it remained compromised until...

Notepad++ Users, You May Have Been Hacked by China

Suspected Chinese state-backed hackers hijacked the Notepad++ update infrastructure to deliver a backdoored version of the popular free source code editor and note-taking app for Windows...

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...