Critical vulnerability in Exchange email server targeted by active exploitation
March 8, 2021 at 14:10, updated September 29, 2021 at 10:45
Exchange email server has a critical vulnerability that has been actively exploited. Software updates are available and should be installed immediately. In addition, system administrators should examine the systems for signs of data breaches. he National Cyber Security Centre Finland (NCSC-FI) is aware of several dozens of data breach incidents. We updated the alert from red to yellow on 23 March and discontinued it on 15 April 2021.
redMarch 9, 2021 at 12:19 The content of the alert was revised in order to address new information. The list of IP addresses compiled by information security provider Volexity was removed in its entirety.