Untrusted search path in Microsoft products - CVE-2026-20943
Published: January 14, 2026
Vulnerability identifier: #VU121455
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2026-20943
CWE-ID: CWE-426
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Microsoft
Affected software:
Microsoft SharePoint Server
Microsoft SharePoint Server Subscription Edition
Microsoft SharePoint Enterprise Server
Microsoft Office
Office Deployment Tool
Microsoft SharePoint Server
Microsoft SharePoint Server Subscription Edition
Microsoft SharePoint Enterprise Server
Microsoft Office
Office Deployment Tool
Detailed vulnerability description
The vulnerability allows a remote attacker to execute arbitrary code on the system.
The vulnerability exists due to usage of an untrusted search path in Microsoft Office Click-To-Run. A remote attacker can trick a victim to open a specially crafted file and execute arbitrary code with escalated privileges.
How to mitigate CVE-2026-20943
Install updates from vendor's website.