---
title: Notepad++ Fixes Critical Updater Flaw Used by Chinese Hackers
description: Notepad++ fixes a critical flaw in its update system exploited by hackers, enhancing security with signature verification in version 8.8.9.
canonical_url: https://codekeeper.co/ticker/notepad-plus-plus-patches-update-system-vulnerability
---

# Notepad++ Fixes Critical Updater Flaw Used by Chinese Hackers

Notepad++ fixes a critical flaw in its update system exploited by hackers, enhancing security with signature verification in version 8.8.9.

![Content Team](https://codekeeper.co/hubfs/_sized/Codekeeper_21_beeldmerkL-800.png)

By Content Team Dec 12, 2025

Share [![Share on facebook](https://codekeeper.co/hubfs/Codekeeper%202025/Icons/Blog%20-%20Facebook.svg)](http://www.facebook.com/share.php?u=https%3A%2F%2Fcodekeeper.co%2Fticker%2Fnotepad-plus-plus-patches-update-system-vulnerability%3Futm_medium%3Dsocial%26utm_source%3Dfacebook) [![Share on linkedin](https://codekeeper.co/hubfs/Codekeeper%202025/Icons/Blog%20-%20Linkedin.svg)](http://www.linkedin.com/shareArticle?mini=true&url=https%3A%2F%2Fcodekeeper.co%2Fticker%2Fnotepad-plus-plus-patches-update-system-vulnerability%3Futm_medium%3Dsocial%26utm_source%3Dlinkedin) [![Share on twitter](https://codekeeper.co/hubfs/Codekeeper%202025/Icons/Blog%20-%20X.svg)](https://twitter.com/intent/tweet?original_referer=https%3A%2F%2Fcodekeeper.co%2Fticker%2Fnotepad-plus-plus-patches-update-system-vulnerability%3Futm_medium%3Dsocial%26utm_source%3Dtwitter&url=https%3A%2F%2Fcodekeeper.co%2Fticker%2Fnotepad-plus-plus-patches-update-system-vulnerability%3Futm_medium%3Dsocial%26utm_source%3Dtwitter&source=tweetbutton&text=) [![Share on email](https://codekeeper.co/hubfs/Codekeeper%202025/Icons/Blog%20-%20Mail.svg)](mailto:?subject=Check%20out%20https%3A%2F%2Fcodekeeper.co%2Fticker%2Fnotepad-plus-plus-patches-update-system-vulnerability%3Futm_medium%3Dsocial%26utm_source%3Demail%20&body=Check%20out%20https%3A%2F%2Fcodekeeper.co%2Fticker%2Fnotepad-plus-plus-patches-update-system-vulnerability%3Futm_medium%3Dsocial%26utm_source%3Demail) ![Copy link](https://codekeeper.co/hubfs/Codekeeper%202025/Icons/Blog%20-%20Copy.svg)

ON THIS PAGE

### Want more insights like this?

Subscribe to our newsletter to get the latest software protection strategies delivered to your inbox.

By submitting your email, you consent to Codekeeper contacting you and agree to our [privacy policy](https://codekeeper.co/privacy-policy) .

Notepad++ has patched a serious vulnerability that allowed hackers to hijack the popular code editor's update system. Security researcher Kevin Beaumont reported that Chinese threat actors exploited this flaw to target telecoms and financial services companies across East Asia in early December. The attack worked by intercepting traffic between Notepad++ and its update servers, tricking users into downloading malicious files instead of legitimate updates. The vulnerability affected the WinGUp updater component, which failed to properly verify the authenticity of downloaded files. Version 8.8.9 now includes signature verification to prevent fake updates from installing. However, experts believe the attacks required significant resources, possibly involving traffic hijacking at the internet service provider level. **Source:** [SecurityWeek](https://www.securityweek.com/notepad-patches-updater-flaw-after-reports-of-traffic-hijacking/)

Share this article [![Share on facebook](https://codekeeper.co/hubfs/Codekeeper%202025/Icons/Blog%20-%20Facebook.svg)](http://www.facebook.com/share.php?u=https%3A%2F%2Fcodekeeper.co%2Fticker%2Fnotepad-plus-plus-patches-update-system-vulnerability%3Futm_medium%3Dsocial%26utm_source%3Dfacebook) [![Share on linkedin](https://codekeeper.co/hubfs/Codekeeper%202025/Icons/Blog%20-%20Linkedin.svg)](http://www.linkedin.com/shareArticle?mini=true&url=https%3A%2F%2Fcodekeeper.co%2Fticker%2Fnotepad-plus-plus-patches-update-system-vulnerability%3Futm_medium%3Dsocial%26utm_source%3Dlinkedin) [![Share on twitter](https://codekeeper.co/hubfs/Codekeeper%202025/Icons/Blog%20-%20X.svg)](https://twitter.com/intent/tweet?original_referer=https%3A%2F%2Fcodekeeper.co%2Fticker%2Fnotepad-plus-plus-patches-update-system-vulnerability%3Futm_medium%3Dsocial%26utm_source%3Dtwitter&url=https%3A%2F%2Fcodekeeper.co%2Fticker%2Fnotepad-plus-plus-patches-update-system-vulnerability%3Futm_medium%3Dsocial%26utm_source%3Dtwitter&source=tweetbutton&text=) [![Share on email](https://codekeeper.co/hubfs/Codekeeper%202025/Icons/Blog%20-%20Mail.svg)](mailto:?subject=Check%20out%20https%3A%2F%2Fcodekeeper.co%2Fticker%2Fnotepad-plus-plus-patches-update-system-vulnerability%3Futm_medium%3Dsocial%26utm_source%3Demail%20&body=Check%20out%20https%3A%2F%2Fcodekeeper.co%2Fticker%2Fnotepad-plus-plus-patches-update-system-vulnerability%3Futm_medium%3Dsocial%26utm_source%3Demail) ![Copy link](https://codekeeper.co/hubfs/Codekeeper%202025/Icons/Blog%20-%20Copy.svg)

![blog_book_a_demo_cta_3x](https://codekeeper.co/hubfs/_sized/Codekeeper%202025/blog_book_a_demo_cta_3x-768x512.webp)

Have questions about protecting your software?

Our escrow experts are standing by to help.

[Book a free demo](https://codekeeper.co/book-a-demo)

YOU MAY ALSO LIKE

[Cyberattacks Brevo Supply Chain Attack Hit Up to 100,000 Websites Sep 21, 2026](https://codekeeper.co/ticker/brevo-supply-chain-attack-malicious-code)

[Vulnerabilities Critical GitLab Flaw Actively Exploited to Steal Server Secrets Sep 24, 2026](https://codekeeper.co/ticker/gitlab-vulnerability-cve-2026-85706-exploitation)

[SymJack Attack Hijacks AI Coding Agents to Deliver Supply Chain Attacks Aug 12, 2026](https://codekeeper.co/ticker/symjack-ai-attack-on-coding-agents)

[Cyberattacks Taiwan Hit by AI-Assisted Cyber-Attack Targeting Government Agencies Aug 17, 2026](https://codekeeper.co/ticker/taiwan-ai-assisted-cyber-attack)