CVE-2026-20943CWE-426

Microsoft Office Click-To-Run Remote Code Execution Vulnerability

High · published January 13, 2026

CVSS v3.1
7.0
EPSS
1%
Percentile
50.3
In the wild
Unconfirmed
What it is

⚡ An untrusted search path in Microsoft Office could allow a crafty attacker to execute code on your local machine with ease! Think of it as a delivery driver following a fake address—anyone could end up at your door leaving packages (or malicious code) without your knowledge. The system doesn’t check if the path is legitimate, making it all too easy for troublemakers to slip in unnoticed. If exploited, this vulnerability could allow an attacker to run unauthorized code on your device, leading to data breaches, system compromise, or malicious software installations. Imagine waking up to find your personal data has been ransacked all because your virtual doormat wasn’t secure!

Put simply

Think of it as a delivery driver following a fake address—anyone could end up at your door leaving packages (or malicious code) without your knowledge. The system doesn’t check if the path is legitimate, making it all too easy for troublemakers to slip in unnoticed. The vulnerability arises from an untrusted search path in Microsoft Office, allowing an attacker to place malicious files within a directory that the application trusts, ultimately executing their code locally without proper authorization.

What to do

If exploited, this vulnerability could allow an attacker to run unauthorized code on your device, leading to data breaches, system compromise, or malicious software installations. Imagine waking up to find your personal data has been ransacked all because your virtual doormat wasn’t secure! To safeguard your system, ensure you update Microsoft Office to the latest version immediately. Additionally, review your security settings and consider disabling the execution of macros from untrusted sources. Finally, educate users about the risks of running unknown files. You've got this! Stay vigilant and with these steps, you'll keep your system safe and sound. 🛡️

The record
Technical detail
CVSS v3.1
7.0 · HIGH
Vector
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
CVSS v4.0
Not supplied
EPSS
0.00646 · 50.3th percentile
Weakness
CWE-426 · Untrusted Search Path
Published
2026-01-13T17:56Z
EPSS history
Timeline
  • 13 JAN 17:56Z
    Microsoft Office Click-To-Run Remote Code Execution Vulnerability
    cvelistv5