Microsoft Patches Critical Unauthenticated RCE Flaw CVE-2026-70024 in IIS
Microsoft published CVE-2026-70024 on October 13, 2026, describing a stack-based buffer overflow in Windows Internet Information Services. The flaw can be reached over the network without credentials or user interaction, and it carries a CVSS 3.1 score of 9.8 with high impacts on confidentiality, integrity and availability. Public sources do not document an affected function, trigger format or proof of concept, and CISA's assessment records no known exploitation. Defenders are advised to check whether hosts run builds below the fixed version, watch for unusual child processes or outbound connections from IIS worker processes, and apply the October 2026 cumulative update.
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