More than 500 UK email servers could have been breached as part of global hacking campaign targeting Microsoft Exchange, cyber-security firm Eset told the BBC.

Last week the tech giant said it was confident that HAFNIUM, a group assessed to be state-sponsored and operating out of China, was responsible for a global cyber-attack that saw multiple threat actors taking advantage of unpatched systems to attack organisations with on-premises Microsoft Exchange servers.

On Tuesday the UK’s National Cyber Security Centre (NCSC) said that Microsoft had released a number of security updates to patch vulnerabilities across some of its servers.

“The NCSC recommends that vendor best practice is followed in the mitigation of vulnerabilities, and in this case it is important that customers install the latest updates immediately,” urged the centre.

Governments around the globe continue to are warn companies to secure their systems.

But experts are saying it could be too late, with at least 10 hacking teams involved in the cyber-attacks, the news organisation reported on Thursday.

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