In a nutshell: Microsoft’s July Patch Day closes two zero-days under active exploitation as well as a third vulnerability with public advance notice.
Microsoft has closed hundreds of security vulnerabilities in July 2026, including dozens of critical issues and two actively exploited zero-days. Patches for identity management systems require priority review by CISOs due to their central authentication function.
In July 2026, Microsoft closed hundreds of security vulnerabilities in its products. The vulnerabilities span critical, important, and moderate severity ratings, with dozens classified as critical.
Two of the vulnerabilities are already being actively exploited by attackers. Additionally, a third vulnerability had become publicly known before patch release, making it available to threat actors without further reverse-engineering effort.
For CISOs, this represents an escalation of prioritization effort: zero-days under active exploitation require immediate assessment and deployment on critical systems, particularly identity management systems that are central to authentication across IT infrastructure. The broad vulnerability population demands parallel structured asset inventorization and risk-based patch sequencing.
Source: www.security-insider.de · Published 15 July 2026
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