This vulnerability (CWE-426) in Microsoft Office 2016 (version 16.0.0) involves an untrusted search path that can be leveraged by an attacker to execute arbitrary code locally. The CVSS 3.1 base score is 7.0, indicating high severity, with attack vector local, high attack complexity, no privileges required, and user interaction required. The vulnerability impacts confidentiality, integrity, and availability with high impact. Microsoft has released an official fix for this issue as documented in their security update guide.

Successful exploitation allows an attacker to execute arbitrary code on the affected system with high impact on confidentiality, integrity, and availability. The attack requires local access and user interaction, with high complexity to exploit. There are no known exploits in the wild at this time.

An official fix is available from Microsoft. Users and administrators should apply the security update provided by Microsoft as detailed in their advisory (https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20943) to remediate this vulnerability.