This vulnerability (CVE-2025-21361) in Microsoft Outlook component of Microsoft Office LTSC for Mac 2021 is classified under CWE-641 (Improper Restriction of Names for Files and Other Resources). It allows an attacker with local access and user interaction to execute arbitrary code remotely by exploiting improper handling of file/resource names. The CVSS 3.1 base score is 7.8 (high), reflecting high impact on confidentiality, integrity, and availability. The vulnerability is published and tracked by Microsoft, with a vendor advisory available but no explicit patch information provided in the input data.

Successful exploitation can result in remote code execution with high impact on confidentiality, integrity, and availability of the affected system. The attacker requires local access and user interaction to trigger the vulnerability. There are no known exploits in the wild at this time.

Patch status is not yet confirmed — check the Microsoft vendor advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21361 for current remediation guidance. Until a patch is available, limit local access to trusted users and exercise caution with user interactions involving Outlook on affected versions.