The vulnerability identified as CVE-2026-33825 affects Microsoft Defender Antimalware Platform version 4.0.0.0 and is categorized under CWE-1220 (Insufficient Granularity of Access Control). It enables an attacker with local authorized access to escalate privileges due to inadequate access control mechanisms. The CVSS v3.1 base score is 7.8, reflecting high impact on confidentiality, integrity, and availability. Microsoft has issued an official fix for this vulnerability, as detailed in their security advisory.

An authorized local attacker can exploit this vulnerability to elevate their privileges on the affected system, potentially gaining higher-level access than intended. This can lead to full compromise of confidentiality, integrity, and availability of the system resources protected by Microsoft Defender Antimalware Platform version 4.0.0.0.

Microsoft has released an official patch that addresses this vulnerability. Users and administrators should apply the provided update from the Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-33825 to remediate the issue. Since this is not a cloud service, remediation depends on applying the patch to affected installations.