Airsnitch

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Keith Donnelly

• March 01, 2026 20:05

Looking at the new Airsnitch vulnerability, do you have any recommendations on hardening a Firewalla network to mitigate the threat?

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  FirewallaSupportDesk

  • March 02, 2026 03:38

  AirSnitch is a set of techniques that allow a malicious device already connected to a Wi-Fi network to:

  • Bypass “client isolation” — a feature meant to stop clients from talking to each other on the same network. 

  • Intercept and manipulate other clients’ network traffic — essentially acting as a **man-in-the-middle (MitM)**for both uplink and downlink traffic. 

  The key here is the device is already authenticated with the network... A "trusted device" can do a lot of things on the network. The best way to guard against these is simply segment or micro segmentation; either using different SSID/PPSK or VqLAN/VLAN.

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  Drew Dunsmore

  • March 02, 2026 19:01

  My understanding is that AirSnitch can work across SSIDs that use the same AP or other connecting infrastructure. If we have a guest network on a different SSID, should we disable it until a patch is available?

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  Firewalla

  • March 02, 2026 19:52

  The best solution is to use VqLAN (if you have AP7) or SSID -> VLAN mapping; these will protect and segment your network at layer 2 (VqLAN) and layer 2/3 (VLAN) These are better methods to make a guest network, and fully isolate from any type of layer 1 attack (such as those from Airsnitch)

   

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