Marriott hotels facing proposed £99m fine for data breach

International hotel chain Marriott is facing a proposed £99m fine for a huge data breach which exposed the details of 339 million of its customers.

The Information Commissioner issued an ‘intention to fine’ notice this week after the massive worldwide leak was reported last year.

The hotel group – which announced plans to open seven new hotels in Scotland in 2017 – is one of the first to be potentially fined under the new General Data Protection Regulation (GDPR).

The proposed fine relates to a cyber incident which was notified to the ICO by Marriott in November 2018. A variety of personal data contained in approximately 339 million guest records globally were exposed by the incident, of which around 30 million related to residents of 31 countries in the European Economic Area (EEA). Seven million related to UK residents.

It is believed the vulnerability began when the systems of the Starwood hotels group were compromised in 2014. Marriott subsequently acquired Starwood in 2016, but the exposure of customer information was not discovered until 2018. The ICO’s investigation found that Marriott failed to undertake sufficient due diligence when it bought Starwood and should also have done more to secure its systems.

Information Commissioner Elizabeth Denham said: “The GDPR makes it clear that organisations must be accountable for the personal data they hold. This can include carrying out proper due diligence when making a corporate acquisition, and putting in place proper accountability measures to assess not only what personal data has been acquired, but also how it is protected.

“Personal data has a real value so organisations have a legal duty to ensure its security, just like they would do with any other asset. If that doesn’t happen, we will not hesitate to take strong action when necessary to protect the rights of the public.”

Marriott has co-operated with the ICO investigation and has made improvements to its security arrangements since these events came to light. The company will now have an opportunity to make representations to the ICO as to the proposed findings and sanction.

The ICO has been investigating this case as lead supervisory authority on behalf of other EU Member State data protection authorities. It has also liaised with other regulators. Under the GDPR ‘one stop shop’ provisions the data protection authorities in the EU whose residents have been affected will also have the chance to comment on the ICO’s findings.

The ICO will consider carefully the representations made by the company and the other concerned data protection authorities before it takes its final decision.