A cyber attack on Mole Valley DC’s website has replaced pages with references to David Miranda, who was recently detained at Heathrow Airport.
Protest group Anonymous is thought to be behind the incident, which forced Mole Valley to close down its website on Monday.
The town hall confirmed that sensitive public information had remained secure and pledged to completely rebuild the website to ensure future security.
It is expected that website services at the local authority will be returned by Thursday.
A council spokesman said: ‘The council is confident that the firewall protecting the public information, databases and internal information services have not been breached.’
Miranda was held for nine hours by British authorities on Sunday under anti-terror laws. He is the partner of Guardian journalist Glenn Greenwald, who published documents from US whistleblower Edward Snowden.