Microsoft has released its security update for July 2026, addressing a staggering 622 vulnerabilities, with 57 categorized as critical. Notably, two vulnerabilities—CVE-2026-56155 (Active Directory Federation Services) and CVE-2026-56164 (SharePoint Server)—have been identified as being exploited in the wild. The critical vulnerabilities primarily consist of remote code execution (RCE) and elevation of privilege (EoP) flaws affecting a wide range of services including Windows DHCP, Media Foundation, and Microsoft Office.
Cisco Talos has flagged eleven of the critical RCE vulnerabilities as "more likely" to be exploited, involving techniques such as heap-based buffer overflows and deserialization. In response to these disclosures, security teams are encouraged to deploy updated Snort rulesets to defend against potential attacks. The breadth of this patch cycle underscores the ongoing need for robust vulnerability management across both on-premises and cloud-based Microsoft ecosystems.
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