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Tag Archives: Exchange Server
Attacks on Exchange Server via ProxyShell vulnerability (8/13/2021)
[German]I'm bringing this up again before the weekend, even though the readership of this blog is probably well informed and keeps the Exchange servers up to date with the latest patches. It's Friday the 13th and we're about to hit … Continue reading
Microsoft Defender automatically mitigates CVE-2021-26855 on Exchange Server
[German]Microsoft is taking the next step in securing on-premises Exchange installations. Microsoft Defender not only detects infections of a system as a result of the ProxyLogon vulnerabilities. The virus scanner can also automatically detect a vulnerable system and closes the … Continue reading
Exchange Server: Terrible Patch Status; v2010 reaches EOL
[German]It's a terrible image, that security firm Rapid 7 draws in it's newest report. Round about 247.000 Exchange Servers are running unpatched and are reachable from the Internet. A lot of Exchange Servers are vulnerable against CVE-2020-0688 and thousands of … Continue reading
New Office and new Exchange Server in 2021
[German]During Ignite 2020, which has just been launched as a virtual conference, Microsoft has announced a new Office for Windows and Mac for 2021, as well as giving initial indications of a new Exchange Server.
Exchange Server: Remote Code Execution Vulnerability CVE-2020-16875
[German]Administrators of Microsoft Echange Server should take care of patching the remote code execution vulnerability CVE-2020-16875. The details or exploits have now been published. But patches has been available since September 8, 2020.
June 2020 Exchange Server quarterly update available
[German]On June 16, 2020, Microsoft released the quarterly update June 2020 for Exchange Server 2016 and Exchange Server 2019. This is a cumulative update that includes bugs reported by customers and the security updates that have been applied so far. … Continue reading
Exchange Server 2013: Issue with Security Update KB4536988
[German]When you install security update KB4536988 (Feb. 2020) to close the vulnerability CVE-2020-0688, Exchange Server 2013 may experience an issue that was described a year ago in Exchange Server 2016.
Posted in issue, Office, Security, Software, Update
Tagged Exchange Server, KB4536988, Security, Update
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Attack to unpatched Exchange Servers (CVE-2020-0688)
[German]Attention Exchange Server Administrators – Cyber criminals are currently scanning the Internet for unpatched Exchange installations to exploit vulnerability CVE-2020-0688.
Posted in Office, Security, Software, Update
Tagged Exchange Server, Security, Update
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Exchange Server 2013 Mail issues after Feb. 2020 Update
[German]A German blog reader contacted me yesterday and mentioned a serious issue he had with an Exchange Server 2013 after installing the latest February 2020 updates. After update installation Mails were accepted, but no longer sorted into the users' mailboxes. … Continue reading
Jan. 2019 Security Update KB4471389 kills Exchange Server
[German]In January 2019, Microsoft released the KB4471389 security update for Exchange Server 2013, 2016, and 2019. On some systems, however, the update causes installation errors, which may render the Exchange Server unusable.