Microsoft Office
CVE-2026-20943 — Microsoft Office Click-To-Run Remote Code Execution Vulnerability
Executive Summary
Untrusted search path in Microsoft Office allows an unauthorized attacker to execute code locally.
Overview
7
CVSS HIGH
Important
MS Severity
Not Exploited
MS Exploit Status
Less Likely
MS Exploit Likelihood
CVSS 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
ATTACK VECTOR
Local
ATTACK COMPLEXITY
High
PRIVILEGES REQUIRED
None
USER INTERACTION
Required
SCOPE
Unchanged
CONFIDENTIALITY
High
INTEGRITY
High
AVAILABILITY
High
EXPLOIT CODE MATURITY
Unproven
REMEDIATION LEVEL
Official Fix
REPORT CONFIDENCE
Confirmed
Temporal Score: 6.1
EPSS Score
0.00652
probability of exploitation in the next 30 days
0.48148 percentile - updated 2026-08-14
View on FIRST.org
Affected Products
6 affected products
| Product | KB Article | Severity | Impact | Restart Required |
|---|---|---|---|---|
| Microsoft Office 2016 (32-bit edition) | 5002826 (Security Update) |
Important | Remote Code Execution | Maybe |
| Microsoft Office 2016 (64-bit edition) | 5002826 (Security Update) |
Important | Remote Code Execution | Maybe |
| Microsoft Office Deployment Tool | Release Notes (Security Update) |
Important | Remote Code Execution | Maybe |
| Microsoft SharePoint Enterprise Server 2016 | 5002828 (Security Update) |
Important | Remote Code Execution | Maybe |
| Microsoft SharePoint Server 2019 | 5002825 (Security Update) |
Important | Remote Code Execution | Maybe |
| Microsoft SharePoint Server Subscription Edition | 5002822 (Security Update) |
Important | Remote Code Execution | Maybe |
Patches
5 patches
| Article | Type | Restart |
|---|---|---|
5002826 |
Security Update | Maybe |
Release Notes |
Security Update | Maybe |
5002828 |
Security Update | Maybe |
5002825 |
Security Update | Maybe |
5002822 |
Security Update | Maybe |
Exploits & PoC
No public exploit or PoC has been linked for this CVE yet. When available, references are sourced from public repositories and may be unverified or non-functional — review carefully before use.
Detection Rules
No public Sigma or Nuclei detection rule has been mapped to this CVE yet. Coverage is concentrated on exploited / high-profile vulnerabilities; check SigmaHQ for updates.
Acknowledgments
Kazuma Matsumoto, Security Researcher at GMO Cybersecurity by IERAE, Inc.
References
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