Microsoft Release Patches for On-Premises Exchange Servers
News|3 March 2021
Microsoft has released patches for multiple on-premises for Microsoft Exchange Server zero-day vulnerabilities that are being exploited by a nation-state affiliated group.
The vulnerabilities exist in on-premises Exchange Servers 2010, 2013, 2016, and 2019. Exchange online is not affected.
To minimise and avoid the impacts of this situation, Microsoft highly recommends that you take immediate action to apply the patches for any on-premises Exchange deployments. Either managed by yourselves or that you are managing for customers. The priority should be servers that are accessible from the internet (e.g. servers publishing Outlook on the web/OAW and ECP).
To patch these vulnerabilities, you should move to the latest Exchange Cumulative Updates and then install the relevant security updates on each Exchange Server.
- You can use the Exchange Server Health Checker script, which can be downloaded from GitHub (use the latest release).
- Running this script will tell you if you are behind on your on-premises Exchange Server updates (note that the script does not support Exchange Server 2010).
- We also recommend that your security team assess whether or not the vulnerabilities were being exploited by using the Indicators of Compromise we shared here.
You can access Microsoft’s Security Update Release relating to this issue here.
Contact Grey Matter
If you have any questions or want some extra information, complete the form below and one of the team will be in touch ASAP. If you have a specific use case, please let us know and we'll help you find the right solution faster.
By submitting this form you are agreeing to our Privacy Policy and Website Terms of Use.
Related News
Secure Impact Launches New Cyber Security Services
Cyber security consultancy, Secure Impact, has announced two new services to support clients looking to improve their security. Microsoft 365 Security Assessment The Microsoft 365 Security Assessment by SI targets the unique needs of cloud environments, highlighting the shared responsibility...
KnowBe4 Acquires Egress To Enhance Their Cyber Security Platform
Our partner, KnowBe4 has announced its acquisition of Egress, a cloud email security company. About KnowBe4 and Egress KnowBe4 is a leader in security awareness training, which helps organisations train their employees to identify and avoid cyber threats. Egress offers...
Microsoft Build – Online Session
21 - 23 May 2024
We’re excited to be a part of this year’s event with an online Partner Showcase. Visit our page and explore our favourite free resources
Surveil dashboard updates – April 2024
There have been several changes to the Surveil platform over the last three weeks that we are excited to share with you. These changes have been designed to improve your overall experience with the platform, as well as add improved...