Stay updated on Exchange Server security with the latest news, updates, and expert insights into protecting your email communications effectively.
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Background for this topic.
Exchange Server is a Microsoft server platform for organizational email, calendars, contacts, and mailbox storage. It may run within an organization or as part of a hybrid environment, and commonly exposes web, mail-transfer, and administration interfaces. Because it stores business communications and can mediate access to accounts, it is a high-value system for security teams.
Security concerns include exploitation of vulnerabilities in internet-facing services, theft or misuse of privileged accounts, and unauthorized mailbox access through weak authentication or compromised credentials. Protection requires prompt, tested security updates; minimizing and monitoring external exposure; strong authentication for administrators and remote access; and careful separation of administrative privileges. Logs from web access, authentication, mailbox activity, and mail flow support detection and investigation. Organizations should also maintain tested backups and recovery procedures, while applying retention, access-control, and privacy requirements to stored messages and attachments.
Microsoft on Friday disclosed that a single activity group in August 2022 achieved initial access and breached Exchange servers by chaining the two newly disclosed zero-day flaws in a limited set of attacks aimed at less than 10 organizations globally
Microsoft Corp. is investigating reports that attackers are exploiting two previously unknown vulnerabilities in Exchange Server, a technology many organizations rely on to send and receive email. Microsoft says it is expediting work on software patches to plug the security holes. In the meantime, it is urging a subset of Exchange customers to enable a setting that could help mitigate ongoing attacks.
Microsoft officially disclosed it investigating two zero-day security vulnerabilities impacting Exchange Server 2013, 2016, and 2019 following reports of in-the-wild exploitation
Microsoft has confirmed that two recently reported zero-day vulnerabilities in Microsoft Exchange Server 2013, 2016, and 2019 are being exploited in the wild. [...]
Security researchers are warning of previously undisclosed flaws in fully patched Microsoft Exchange servers being exploited by malicious actors in real-world attacks to achieve remote code execution on affected systems
Remember this next time Microsoft talks about how seriously it takes security Security researchers have warned a zero-day flaw in Microsoft’s Exchange server is being actively exploited.…