Microsoft Defender Multiple Vulnerabilities

Multiple vulnerabilities were identified in Microsoft Defender. Attacker could exploit some of these vulnerabilities to trigger remote code execution, denial of service condition and elevation of privilege on the targeted system.

Note:

CVE-2026-45498 is being exploited in the wild.  Microsoft Defender contains an unspecified vulnerability that allows for denial of service.

CVE-2026-41091 is being exploited in the wild. Improper link resolution before file access ('link following') in Microsoft Defender allows an authorized attacker to elevate privileges locally. 

Hence, the risk level is rated as High Risk.

[Updated on 2026-05-26]

Updated Description, Impact, Solutions, Vulnerability Identifier and Related Links.