The Log4j zero-day vulnerability, also referred to as Log4Shell, was discovered in December 2021. This open-source software vulnerability allows attackers to inject malicious code which can be executed on the system, posing a significant risk due to the wide number of impacted systems and lack of available patch. Log4j remains an ongoing threat, particularly for systems that aren’t operating on the most recent, patched versions.

Cyber incident disrupts services at Marks & Spencer – Digital Watch Observatory
A cyber incident has disrupted services at Marks & Spencer, affecting operations significantly. The Digital Watch Observatory reported that the breach led to service interruptions,