Critical · published October 1, 2025
⚡ Just a few crafty login attempts could let unauthorized users slip right into your network! 🔓 Think of it like a hotel where anyone can keep trying the door codes until they find one that opens the door. Once inside, they can access all the amenities without ever checking in! An attacker could exploit this vulnerability to gain unauthorized network access, potentially leading to data leaks or manipulation of sensitive information. With your network wide open, anything from personal data to connected devices is at risk!
Think of it like a hotel where anyone can keep trying the door codes until they find one that opens the door. Once inside, they can access all the amenities without ever checking in! This vulnerability in ExtremeGuest Essentials allows unauthenticated devices to be marked as authenticated after repeated login attempts on specific captive-portal configurations. Even without MAC-authentication enabled, the logs may inaccurately show the client's MAC as the username, misleading network monitoring.
An attacker could exploit this vulnerability to gain unauthorized network access, potentially leading to data leaks or manipulation of sensitive information. With your network wide open, anything from personal data to connected devices is at risk! Update to ExtremeGuest Essentials version 25.5.0 or later to patch this vulnerability. Additionally, consider implementing stronger rate-limiting measures to mitigate brute-force attacks and review your captive-portal configurations for security gaps. You've got this! Follow these steps to secure your network and keep those unwanted guests out! 🛡️
| Product | Versions | Fixed in |
|---|---|---|
| extremenetworks/extremeguest_essentials | < 25.5.0 | 25.5.0 |