On March 2nd , 2021, Volexity reported the in-the-wild exploitation of the following Microsoft Exchange Server vulnerabilities: CVE-2021-26855, CVE-2021-26857, CVE-2021-26858 and CVE-2021-27065. Further investigation uncovered that an attacker was exploiting a zero-day and used in the wild. The attacker was using the vulnerability to steal full contents of several user mailboxes. This vulnerability is remotely exploitable and does not require…
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Author Of this post: Grace McDougal