Tag Archives: Exchange

USA, EU, NATO, Microsoft & Co. Blame China for Hafnium Exchange Hack

[German]At the end of February, beginning of March 2021, there was a massive attack on Microsoft Exchange Server (see Exchange server 0-day exploits are actively exploited), in which many thousands of instances were hacked worldwide. Even then, the attacks were … Continue reading

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Exchange security updates from July 2021 breaks ECP and OWA

[German]As of July 13, 2021, Microsoft has released security updates for Exchange Server 2013, Exchange Server 2016 and Exchange Server 2019. These July updates are intended to address vulnerabilities reported by external security partners and found by Microsoft’s internal processes … Continue reading

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Security updates for Exchange Server (July 2021)

[German]Microsoft has released security updates for Exchange Server 2013, Exchange Server 2016 and Exchange Server 2019 as of July 13, 2021. These July updates are required to address vulnerabilities reported by external security partners and found through Microsoft’s internal processes. … Continue reading

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Exchange 2016/2019: Outlook problems due to AMSI integration

[German]A brief note for administrators of a Microsoft Exchange Server 2016/2019. With CU21 (Exchange 2016) and CU10 (Exchange 2019) an AMSI integration was introduced to support third-party virus scanners. However, this integration causes severe problems with Outlook with various antivirus … Continue reading

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Cumulative Exchange CUs June 2021 released

[German]Microsoft had delayed the quarterly cumulative updates for Exchange Server, which actually come out on the third Tuesday of each month, to the end of the month (see info June 2021 Cumulative Update for Exchange Server postphoned). However, as of … Continue reading

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June 2021 Cumulative Update for Exchange Server postphoned

[German]Microsoft normally releases the quarterly cumulative updates (CUs) for Exchange Server on the third Tuesday of the month. This would be regularly on June 15, 2021. The days Microsoft informed in a tech community post that the June CUs for … Continue reading

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Epsilon Red ransomware targets unpatched Exchange servers

[German]Brief warning to administrators of Microsoft Exchange servers. While investigating an attack on a major U.S. hospitality company, security firm Sophos has discovered a new ransomware called Epsilon Red. Red Epsilon exploits unpatched vulnerabilities in Microsoft Exchange servers to infect … Continue reading

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Security Updates (KB5003435) for Microsoft Exchange Server (May 11, 2021)

[German]Microsoft has announced on May 11, 2021 – the expected (see Is a hotfix for Microsoft Exchange coming today? (May 11, 2021)) Security updates released for Exchange Server 2013, Exchange Server 2016 and Exchange Server 2019. This is to immediately … Continue reading

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Is a hotfix for Microsoft Exchange coming today? (May 11, 2021)

[German]A brief note and heads up for administrators of Microsoft Exchange on-premises systems. Reserve some time today (05/11/2021) to patch Exchange servers.  If the available information is correct, Microsoft is rolling out a critical hotfix for Microsoft Exchange Server in … Continue reading

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PoC for Microsoft Exchange bug discovered by NSA public

[German]Various security vulnerabilities in Microsoft Exchange were discovered by the US intelligence agency NSA and reported to Microsoft. Microsoft closed these vulnerabilities in April 2020 with corresponding updates. As a “reminder for the weekend”, we would like to point out … Continue reading

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