Tesco’s website and app was targeted by cyber attack in October 2021.
Their online grocery store website and app were interrupted.
There have been issues with the site's search feature as a result of an attempt to meddle with their systems.
They apologise for the inconvenience and worked very hard to fully restore all services.
Source: https://www.itgovernance.co.uk/blog/tesco-website-and-app-back-online-after-attempted-cyber-attack
"id": "TES18811222",
"linkid": "-tesco",
"type": "Cyber Attack",
"date": "10/2021",
"severity": "60",
"impact": "2",
"explanation": "Attack limited on finance or reputation"