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The sample files in the authfiles directory in Microsoft Commerce Server 2002 before SP2 allow remote attackers to bypass authentication by logging in to authfiles/login.asp with a valid username and any password, then going to the main site twice.
Use Microsoft vendor hub and Commerce Server product page to widen CVE-2006-1257 into its surrounding weakness, vendor, and product context.
Compare it with CVE-2012-1856, CVE-2012-0158 and CVE-2007-1201 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.