Microsoft Reports Severe Zero-Day Flaw in On-Prem Exchange Servers
The zero-day vulnerability affects on-premises installations for all versions of Exchange Server 2016, 2019 and Subscription Edition
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Background for this topic.
Exchange Server is a mail server and calendaring server developed by Microsoft. It provides email, calendar and contacts on a networked platform, facilitating communication and scheduling for businesses and organizations.
In the context of information security, Exchange Server is crucial as it often handles sensitive information and proprietary business communications. Security measures are essential to protect against unauthorized access, data breaches, and various forms of cyber threats such as phishing attacks, malware distribution, and exploitation of vulnerabilities within the server's architecture. Managing and securing an Exchange Server involves implementing strong authentication protocols, ensuring timely updates and patches, and monitoring for suspicious activities to maintain the confidentiality, integrity, and availability of the data it processes and stores.
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The zero-day vulnerability affects on-premises installations for all versions of Exchange Server 2016, 2019 and Subscription Edition
On Thursday, Microsoft shared mitigations for a high-severity Exchange Server vulnerability exploited in attacks that allow threat actors to execute arbitrary code via cross-site scripting (XSS) while targeting Outlook on the web users. [...]
Microsoft has disclosed a new security vulnerability impacting on-premise versions of Exchange Server that it said has come under active exploitation in the wild