In mid-December 2021, a major cybersecurity vulnerability named Log4shell was discovered in Apache Log4j, a widely-used logging utility in the Java programming language. The issue was found before it could be fixed, a situation known as a “zero-day” vulnerability. The breach is a serious concern due to its potential to expose sensitive personal data. Remedying the vulnerability is now a priority and experts recommend vigilant user behaviour and preventive measures such as identity theft protection.

M&S shoppers urged to follow 'simple rule' after cyber incident – Daily Express
M&S shoppers are advised to adhere to a “simple rule” following a recent cyber incident. The guidance aims to help customers protect their personal information