Summary
Governments and organisations temporarily shut down some online services while applying security updates.
Regular internet users are not at risk of data theft but should keep software updated and avoid suspicious links.
The vulnerability could let attackers take control of vulnerable servers.
Security updates were released quickly to fix the problem.
Users should stay alert to strange emails and keep passwords strong.
Governments and organisations temporarily shut down some online services while applying security updates.
Regular internet users are not at risk of data theft but should keep software updated and avoid suspicious links.
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