Microsoft Exchange
Exchange Online will soon start blocking emails from old, vulnerable on-prem servers
Slowly but surely, Microsoft aims to make it impossible for unsupported and/or unpatched on-prem Microsoft Exchange servers to use the company’s Exchange Online hosted …
Microsoft Exchange admins advised to expand antivirus scanning
After having stressed the importance of keeping Exchange servers updated last month, Microsoft is advising administrators to widen the scope of antivirus scanning on those …
Microsoft patches three exploited zero-days (CVE-2023-21715, CVE-2023-23376, CVE-2023-21823)
The February 2023 Patch Tuesday is upon us, with Microsoft releasing patches for 75 CVE-numbered vulnerabilities, including three actively exploited zero-day flaws …
Microsoft plugs actively exploited zero-day hole (CVE-2023-21674)
To mark the January 2023 Patch Tuesday, Microsoft has released patches for 98 CVE-numbered vulnerabilities, including one exploited in the wild (CVE-2023-21674) and one …
Rackspace ransomware attack was executed by using previously unknown security exploit
The MS Exchange exploit chain recently revealed by Crowdstrike researchers is how the Play ransomware gang breached the Rackspace Hosted Exchange email environment, the …
New Microsoft Exchange exploit chain lets ransomware attackers in (CVE-2022-41080)
Ransomware-wielding attackers are using a new exploit chain that includes one of the ProxyNotShell vulnerabilities (CVE-2022-41082) to achieve remote code execution on …
Rackspace Hosted Exchange outage was caused by ransomware
Rackspace has finally confirmed the cause of the ongoing outage of its Hosted Exchange service: it’s ransomware. “As you know, on Friday, December 2nd, 2022, we …
Rackspace Hosted Exchange service outage caused by security incident
Cloud computing company Rackspace has suffered a security breach that has resulted in a still ongoing outage of their Hosted Exchange environment. “In order to best …
Microsoft fixes many zero-days under attack
November 2022 Patch Tuesday is here, with fixes for many vulnerabilities actively exploited in the wild, including CVE-2022-41091, a Windows Mark of the Web bypass flaw, and …
October 2022 Patch Tuesday forecast: Looking for treats, not more tricks
We’ve entered the final quarter of 2022 with a favorite holiday for many – Halloween, at the end of the month. Unfortunately, Microsoft has continued to play a few tricks on …
MS Exchange zero-days: The calm before the storm?
CVE-2022-41040 and CVE-2022-41082, the two exploited MS Exchange zero-days that still have no official fix, have been added to CISA’s Known Exploited Vulnerabilities …
Two Microsoft Exchange zero-days exploited by attackers (CVE-2022-41040, CVE-2022-41082)
Attackers are leveraging two zero-day vulnerabilities (CVE-2022-41040, CVE-2022-41082) to breach Microsoft Exchange servers. News of the attacks broke on Wednesday, when …
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