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Microsoft Internet Security and Acceleration (ISA) Server 2004 logs unusual ASCII characters in the Host header, including the tab, which allows remote attackers to manipulate portions of the log file and possibly leverage this for other attacks.
Use Microsoft vendor hub and Isa Server product page to widen CVE-2006-7027 into its surrounding weakness, vendor, and product context.
Compare it with CVE-2009-1534, CVE-2009-0562 and CVE-2009-1136 for nearby disclosures in the same product family. Additional editorial context is available in Weekly Security Roundup: Navigating the April 2026 Threat Landscape and Critical Framework Exploits.