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Critical Exim Server Vulnerabilities Enable Full Server Control by Attackers

First seen 22 Dec 2025, 21:57 UTC • •

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ThreatCluster AI
ThreatCluster •March 12, 2026 at 13:27 UTC

Security researchers at NIST have identified critical vulnerabilities in the Exim mail server, specifically affecting version 4.99 with SQLite hints database support. These flaws could allow remote attackers to gain complete control over thousands of vulnerable mail servers.

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