![]() New MSTIC blog post called Microsoft Exchange Server Vulnerabilities Mitigations – March 2021. This is my senior Canadian colleagues who put this together to illustrate the upgrade paths. Microsoft CSS PowerShell Scripts for mitigation and detectionĮxchange Team Blog – Security Updates Now Available For Additional Cumulative Updates Security update for Exchange Server 2010 Service Pack 3 (KB5000978) The below are the CVEs which are being targeted against Exchange for reference.ĬVE-2021-26855 | Microsoft Exchange Server Remote Code Execution VulnerabilityĬVE-2021-26857 | Microsoft Exchange Server Remote Code Execution VulnerabilityĬVE-2021-26858 | Microsoft Exchange Server Remote Code Execution VulnerabilityĬVE-2021-27065 | Microsoft Exchange Server Remote Code Execution Vulnerability Exchange 2010 should be decommissioned ASAP.Įxchange 2003 and Exchange 2007 are also unsupported, and should not be present in a production environment. An update is provided for Exchange 2010 as a defense in depth mechanism as it is vulnerable in a mixed environment. Update 19-3-2021 - Added reference to new Defender capabilityĮxchange 2010 supported ended on the 14th of October 2020. ![]() Update 16-3-2021 - Added link to the One Click Mitigation Tool These updates will not appear on Microsoft Update. These security updates will be released on the Microsoft Download Center only. Your servers will not protected from all know issues until you upgrade to a supported CU and install the current SU. ![]() Please note that this additional SU does not address the lack of support for outdated Exchange builds and it only addresses the aforementioned CVEs. This has been modified and a SU is available for more CUs. Update 8-3-2021 - Initially the Security Update (SU) was only available for the currently support Exchange Cumulative Updates (CUs). If you read nothing else, please ensure that you install the update from an elevated CMD prompt if you are manually installing.įailing to do this, will not install the update properly and you will be vulnerable. I will purposefully not include the content of the other locations as it is changing so rapidly, and there is no way to ensure that it would be updated here in a timely fashion. The below are a series of links, tips and some very brief thoughts on Hafnium.
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