Windows Notepad App Remote Code Execution Vulnerability

Improper neutralization of special elements used in a command 'command injection' in Windows Notepad App allows an unauthorized attacker to execute code locally...

PT-2026-7330

Name of the Vulnerable Software and Affected Versions Windows Notepad versions prior to 11.2502.1.0 Windows 10 and Windows 11 versions prior to February 2026 Patch Tuesday Description A command injection issue exists in the modern Microsoft Store version of the Windows Notepad app due to improper...

Microsoft Windows Notepad 命令注入漏洞

Microsoft Windows Notepad is a text editor program from Microsoft USA. A command injection vulnerability exists in Microsoft Windows Notepad. The vulnerability stems from the application failing to properly filter constructed command special characters, commands, etc. An attacker could exploit th...

KLA90876 ACE vulnerability in Microsoft Apps

A remote code execution vulnerability was found in Microsoft Apps. Malicious users can exploit this vulnerability to execute arbitrary code, bypass security restrictions. Original advisories CVE-2026-20841 Exploitation Public exploits exist for this vulnerability. Malware exists for this...

⚡ Weekly Recap: AI Skill Malware, 31Tbps DDoS, Notepad++ Hack, LLM Backdoors and More

Cyber threats are no longer coming from just malware or exploits. They’re showing up inside the tools, platforms, and ecosystems organizations use every day. As companies connect AI, cloud apps, developer tools, and communication systems, attackers are following those same paths. A clear pattern...

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...

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...

The Notepad++ supply chain attack — unnoticed execution chains and new IoCs

UPD 11.02.2026: added recommendations on how to use the Notepad++ supply chain attack rules package in our SIEM system. Introduction On February 2, 2026, the developers of Notepad++, a text editor popular among developers, published a statement claiming that the update infrastructure of Notepad++...

Notepad++ Hosting Breach Attributed to China-Linked Lotus Blossom Hacking Group

A China-linked threat actor known as Lotus Blossom has been attributed with medium confidence to the recently discovered compromise of the infrastructure hosting Notepad++. The attack enabled the state-sponsored hacking group to deliver a previously undocumented backdoor codenamed Chrysalis to...

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++ 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...

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++ < 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...