Microsoft Office Excel
CVE-2026-47642 — Microsoft Excel Remote Code Execution Vulnerability
Executive Summary
Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
Overview
7.8
CVSS HIGH
Important
MS Severity
Not Exploited
MS Exploit Status
Less Likely
MS Exploit Likelihood
CVSS Vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
ATTACK VECTOR
Local
ATTACK COMPLEXITY
Low
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: 6.8
EPSS Score
0.00404
probability of exploitation in the next 30 days
0.33498 percentile - updated 2026-08-14
View on FIRST.org
Affected Products
12 affected products
| Product | KB Article | Severity | Impact | Restart Required |
|---|---|---|---|---|
| Microsoft 365 Apps for Enterprise for 32-bit Systems | Click to Run (Security Update) |
Important | Remote Code Execution | No |
| Microsoft 365 Apps for Enterprise for 64-bit Systems | Click to Run (Security Update) |
Important | Remote Code Execution | No |
| Microsoft Office 2019 for 32-bit editions | Click to Run (Security Update) |
Important | Remote Code Execution | No |
| Microsoft Office 2019 for 64-bit editions | Click to Run (Security Update) |
Important | Remote Code Execution | No |
| Microsoft Office 365 for Mac | Release Notes (Security Update) |
Important | Remote Code Execution | Maybe |
| Microsoft Office LTSC 2021 for 32-bit editions | Click to Run (Security Update) |
Important | Remote Code Execution | No |
| Microsoft Office LTSC 2021 for 64-bit editions | Click to Run (Security Update) |
Important | Remote Code Execution | No |
| Microsoft Office LTSC 2024 for 32-bit editions | Click to Run (Security Update) |
Important | Remote Code Execution | No |
| Microsoft Office LTSC 2024 for 64-bit editions | Click to Run (Security Update) |
Important | Remote Code Execution | No |
| Microsoft Office LTSC for Mac 2021 | Release Notes (Security Update) |
Important | Remote Code Execution | Maybe |
| Microsoft Office LTSC for Mac 2024 | Release Notes (Security Update) |
Important | Remote Code Execution | Maybe |
| Office Online Server | 5002884 (Security Update) |
Important | Remote Code Execution | Maybe |
Patches
3 patches
| Article | Type | Restart |
|---|---|---|
Click to Run |
Security Update | No |
Release Notes |
Security Update | Maybe |
5002884 |
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
Haifei Li with EXPMON
References
On This Page