Exchange Server attacks: Run this Microsoft malware scanner now, CISA tells government agencies

The Cybersecurity and Infrastructure Security Agency (CISA) has instructed US government agencies with on-premise Exchange systems to run Microsoft malware scanners and report results by April 5.

CISA issued supplementary direction to its “ED 21-02” directive; the new request applies to any federal agency that had an Exchange server connected directly or indirectly to the internet at any point since January 1, 2021.

The move follows the discovery of software flaws in on-premise versions of Microsoft Exchange Server being exploited by attackers. Exploitation of these vulnerabilities allows an attacker to access on-premises Exchange Servers, enabling them to gain persistent system access and control of an enterprise network.

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Source: ZDNet