Wi-Fi connects billions of devices every day, powering work, communication, banking, and entertainment. Since the network handles so much sensitive data, it also requires a strong layer of security. However, researchers have now warned about a new technique called AirSnitch, which exposes a critical vulnerability in the client isolation feature.
AirSnitch exposes Wi-Fi client isolation vulnerability in modern networks
AirSnitch does not crack Wi-Fi encryption in the traditional sense. Instead, it exposes a critical flaw around it. The attack targets weaknesses in the lowest layers of the network system. This is where the devices are identified, and traffic is directed. Further, it directly manipulates how a router links a device’s identity to its connection point. This allows an attacker to quietly redirect data that was meant for someone else.
The technique is similar to older network tricks once seen in early public Wi-Fi spaces. The attacker impersonates a victim’s device by copying its MAC address. The router then updates its internal table and sends the victim’s traffic to the attacker instead. Once this happens, the intruder can read or even change the data before passing it along. As a result, client isolation is bypassed, even though encryption itself is not technically broken.
AirSnitch is more vulnerable than you think
Researchers have warned that AirSnitch works across many popular home and enterprise routers. The issue is especially concerning in large spaces where multiple access points share the same network infrastructure. Even devices connected to different network names can sometimes be exposed if the systems are linked behind the scenes. All of this is enough to call AirSnitch very dangerous.
However, the risk depends on how well a network is secured. If traffic is not encrypted at higher levels, sensitive information such as passwords or internal company data could be exposed. Even with HTTPS in place, attackers may still see metadata or attempt advanced tricks like DNS manipulation. Since some weaknesses are tied to hardware design, it’s not easy to find a fix. So, unless tech giants figure out a working solution, users should be cautious when connecting to Wi-Fi networks.
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