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The Remote Data Service (RDS) DataFactory component of Microsoft Data Access Components (MDAC) in IIS 3.x and 4.x exposes unsafe methods, which allows remote attackers to execute arbitrary commands.
Use CWE-264, Microsoft vendor hub and Data Access Components product page to widen CVE-1999-1011 into its surrounding weakness, vendor, and product context.
Compare it with CVE-2003-0903, CVE-2002-1918 and CVE-2012-1891 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.