Is it legal to use someone else’s Wi-Fi without permission?

Using someone else’s Wi-Fi without their consent is illegal in the UK under the Computer Misuse Act 1990, which makes it a criminal offence to intentionally access a computer or network without authorisation. This includes accessing an unsecured Wi-Fi network or guessing a password to connect.

The Law on Unauthorised Network Access

Under Section 1 of the Computer Misuse Act, unauthorised access to a network, even if unprotected or guessed, can lead to serious consequences. The penalties include up to two years in prison or a substantial fine. The law recognises this unauthorised access as more than merely "borrowing" internet.

Potential Risks and Consequences of Using Unauthorised Wi-Fi

Connecting to another person’s Wi-Fi without permission isn’t only illegal; it can also have technical and security repercussions. Unauthorised users can slow down the network, increase the risk of security breaches, and potentially access private information on the network.

Bottom Line

Accessing another person’s Wi-Fi without permission may seem harmless, but legally, it constitutes unauthorised access under UK law and carries serious penalties. Beyond legal consequences, unauthorised usage can also compromise the security and performance of the network for its rightful owner.