Microsoft Patches 18 Vulnerabilities in AI, Cloud Products

Summary

Microsoft has released fixes for 18 vulnerabilities affecting its Azure cloud services and AI products like Copilot. The majority of these are privilege escalation flaws, with some information disclosure and spoofing vulnerabilities also addressed. While rated critical by Microsoft, CVSS scores indicate high or medium severity for some. All fixes are server-side, requiring no action from customers, and none have been reported as exploited.

Full text

Microsoft released patches for 18 vulnerabilities on Thursday, spanning its Azure cloud portfolio and Copilot-branded AI products. Elevation of privilege flaws made up the bulk of the disclosures, affecting Azure ARC, Azure AI Foundry, Azure Logic Apps, Azure Billing, Azure HorizonDB, Azure Cosmos DB, Azure Container Registry, Microsoft Fabric, Microsoft Dataverse, and Microsoft 365 Copilot. Several information disclosure vulnerabilities were addressed in Copilot, Microsoft 365 Copilot, Microsoft 365 Copilot Business Chat, and Azure Machine Learning. A single spoofing vulnerability was patched in Azure Portal. Microsoft rated all vulnerabilities as critical, but their CVSS scores indicate high or medium severity for some. While some of these flaws were discovered internally by Microsoft, many were reported to the software giant by external researchers. None of the vulnerabilities have been flagged as exploited, and Microsoft noted that all fixes were implemented on the server side, meaning that customers do not need to take any action.Advertisement. Scroll to continue reading. Microsoft also announced patches this week for a privilege escalation vulnerability affecting Windows. Users do need to update Windows to resolve this flaw, tracked as CVE-2026-85921, but Microsoft believes exploitation is ‘less likely’. Like most major organizations, Microsoft has seen vulnerability discovery surge in recent months, driven by increased use of advanced AI. The company fixed a record-breaking 970 vulnerabilities across its products with the latest Patch Tuesday updates. Related: Microsoft Commits to Sweeping AI Privacy Rules for Students. Will Other Tech Giants Follow? Related: Microsoft AI Code of Conduct Sets Cyberattack Boundaries, Chain of Command, Safety Constraints Related: New ‘ShieldCrash’ Zero-Day Exploit Targets Microsoft Defender Written By Eduard Kovacs Eduard Kovacs (@EduardKovacs) is senior managing editor at SecurityWeek. He worked as a high school IT teacher before starting a career in journalism in 2011. Eduard holds a bachelor’s degree in industrial informatics and a master’s degree in computer techniques applied in electrical engineering. Daily Briefing Newsletter Subscribe to the SecurityWeek Email Briefing for the latest cybersecurity threats, trends, and expert insights. 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Indicators of Compromise

• cve — CVE-2026-85921

Entities