About this tag
CVE-2021-26855 is a critical vulnerability in Microsoft Exchange Server that allows an unauthenticated attacker to execute arbitrary code on vulnerable systems. Exploitation can lead to persistent access, file and mailbox compromise, and credential theft. This tag covers discussions about mitigation steps, patching guidance, and security advisories related to this Exchange Server flaw, including CISA alerts and Microsoft's out-of-band updates.
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AA21-062A: Mitigate Microsoft Exchange Server Vulnerabilities
Original release date: March 3, 2021 Summary Cybersecurity and Infrastructure Security (CISA) partners have observed active exploitation of vulnerabilities in Microsoft Exchange Server products. Successful exploitation of these vulnerabilities allows an unauthenticated attacker to execute...- News
- Security
- active directory cve-2021-26855 cybersecurity exchange server forensics incident response indicators of compromise malicious software microsoft mitigation monitoring network security patch remote code execution security tactics threat intelligence user agent vulnerability web shells
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- Forum: Security Alerts