Urgent Microsoft Exchange Vulnerability
Where is the threat coming from?
At this point in time, Microsoft has identified the group – Hafnium as responsible for the threat and attack. It is believed that Hafnium is a state-sponsored threat actor based out of China.
How is it spread?
It is believed the threat is spread through 4 separate vulnerabilities in Microsoft Exchange Server. If a server has open connectivity to the Internet through port 443, which is very common, the attackers can take advantage of the vulnerability to gain access to email and data to exfiltrate the information.
How serious is the threat?The threat is extremely serious in that it allows the attacker to not only get access to the data but also execute commands on the affected servers and related network. The most significant issue is that most if not all security is not able to detect and prevent this threat as of yet. Some cybersecurity firms have estimated that over 25% of the systems they have investigated have been affected by the vulnerability.
How do you protect your environment?
It is advised to immediately download and apply the recommended emergency patches from Microsoft. More information on this particular vulnerability can be found on the Microsoft blog located at –
If you have any questions or need assistance applying these emergency patches –
please call us at 417-334-0494
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