Microsoft Office Excel
CVE-2026-32188 — Microsoft Excel Information Disclosure Vulnerability
Executive Summary
Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.
Overview
7.1
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:N/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
None
AVAILABILITY
High
EXPLOIT CODE MATURITY
Unproven
REMEDIATION LEVEL
Official Fix
REPORT CONFIDENCE
Confirmed
Temporal Score: 6.2
EPSS Score
0.00411
probability of exploitation in the next 30 days
0.32601 percentile - updated 2026-06-21
View on FIRST.org
Affected Products
13 affected products
| Product | KB Article | Severity | Impact | Restart Required |
|---|---|---|---|---|
| Microsoft 365 Apps for Enterprise for 32-bit Systems | Click to Run (Security Update) |
Important | Information Disclosure | No |
| Microsoft 365 Apps for Enterprise for 64-bit Systems | Click to Run (Security Update) |
Important | Information Disclosure | No |
| Microsoft Excel 2016 (32-bit edition) | 5002860 (Security Update) |
Important | Information Disclosure | Maybe |
| Microsoft Excel 2016 (64-bit edition) | 5002860 (Security Update) |
Important | Information Disclosure | Maybe |
| Microsoft Office 2019 for 32-bit editions | Click to Run (Security Update) |
Important | Information Disclosure | No |
| Microsoft Office 2019 for 64-bit editions | Click to Run (Security Update) |
Important | Information Disclosure | No |
| Microsoft Office LTSC 2021 for 32-bit editions | Click to Run (Security Update) |
Important | Information Disclosure | No |
| Microsoft Office LTSC 2021 for 64-bit editions | Click to Run (Security Update) |
Important | Information Disclosure | No |
| Microsoft Office LTSC 2024 for 32-bit editions | Click to Run (Security Update) |
Important | Information Disclosure | No |
| Microsoft Office LTSC 2024 for 64-bit editions | Click to Run (Security Update) |
Important | Information Disclosure | No |
| Microsoft Office LTSC for Mac 2021 | Release Notes (Security Update) |
Important | Information Disclosure | Maybe |
| Microsoft Office LTSC for Mac 2024 | Release Notes (Security Update) |
Important | Information Disclosure | Maybe |
| Office Online Server | 5002855 (Security Update) |
Important | Information Disclosure | Maybe |
Patches
4 patches
| Article | Type | Restart |
|---|---|---|
Click to Run |
Security Update | No |
5002860 |
Security Update | Maybe |
Release Notes |
Security Update | Maybe |
5002855 |
Security Update | Maybe |
Known Exploits
No known exploits have been linked for this CVE yet. When available, exploit references will be sourced from public repositories and may be unverified, incomplete, or non-functional. Always review code carefully before use in any environment.
Acknowledgments
References
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