The UK Parliament has suffered the biggest ever cyber attack against the email systems, it shut down external access to e-mail accounts on Saturday after a cyberattack. The attack was sustained and determined, hackers launched a prolonged brute-force attack on the Parliament email system in the attempt to access accounts. The brute force assault lasted for more than 12 hours on Friday as unknown hackers repeatedly targeted weak passwords of politicians and aides. It is not clear if the cyber attack was linked to the discovery of the availability of UK politicians login credentials for sale on the dark web.”]
Source: https://securityaffairs.co/wordpress/60404/hacking/uk-parliament-cybercattack.html