--- title: "Palo Alto Networks zero-day exploited since March to backdoor firewalls" url: https://daily.dev/posts/palo-alto-networks-zero-day-exploited-since-march-to-backdoor-firewalls-ezloifisx source_url: https://www.bleepingcomputer.com/news/security/palo-alto-networks-zero-day-exploited-since-march-to-backdoor-firewalls/ type: article source: "Lobsters" published: 2024-04-17T17:35:19.218Z updated: 2024-05-09T08:39:06.345Z tags: ["zero-day"] reading_time: 5 upvotes: 1 comments: 0 language: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Palo Alto Networks zero-day exploited since March to backdoor firewalls **[Lobsters](https://daily.dev/sources/lobsters)** · 5 min read · 1 upvotes · 0 comments ## Summary Suspected state-sponsored hackers have been exploiting a zero-day vulnerability in Palo Alto Networks firewalls since March to breach internal networks and steal data. The vulnerability is tracked as CVE-2024-3400. Palo Alto Networks has released mitigations and patches on April 14. The threat actors have been using a custom backdoor named 'Upstyle' to execute commands on compromised devices. Detecting a compromised Palo Alto Networks firewall can be done by generating a Tech Support File or monitoring network activity. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [Don’t just attend KubeCon \+ CloudNativeCon, Merge Forward your experience\!](https://daily.dev/posts/don-t-just-attend-kubecon-cloudnativecon-merge-forward-your-experience--l0rpp73x8) · CNCF · 0 upvotes · 0 comments - [Announcing H2 2026 KCDs](https://daily.dev/posts/announcing-h2-2026-kcds-m96goajm1) · CNCF · 1 upvotes · 0 comments - [Two months of Open Community Groups](https://daily.dev/posts/two-months-of-open-community-groups-asf52zhbs) · CNCF · 0 upvotes · 0 comments --- Tags: [#zero-day](https://daily.dev/tags/zero-day) [View this post on daily.dev](https://daily.dev/posts/palo-alto-networks-zero-day-exploited-since-march-to-backdoor-firewalls-ezloifisx)