OnlyPatch
Microsoft Office

CVE-2025-54906 — Microsoft Office Remote Code Execution Vulnerability

Important CVSS 7.8 EPSS 0.00686 2025-09 archive

Executive Summary

Free of memory not on the heap in Microsoft Office 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
Category Remote Code Execution
Weakness CWE-416: Use After Free
Released Sep 9 2025
Last Updated Sep 9 2025
Publicly Disclosed No
CISA KEV Not Listed
Known Exploits None Known
EPSS Score 0.00686 — 0.4889 percentile
NVD CVSS 7.8 HIGH — matches MSRC

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

0.00686
probability of exploitation in the next 30 days
0.4889 percentile - updated 2026-07-25
View on FIRST.org

Affected Products

10 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 2016 (32-bit edition) 5002781 (Security Update) 5002576 (Security Update) 5002766 (Security Update) Important Remote Code Execution 5002756 5002469 5002635 Base: 7.8 Temporal: 6.8 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 16.0.5517.1000 Maybe None Microsoft Office 2016 (64-bit edition) 5002781 (Security Update) 5002576 (Security Update) 5002766 (Security Update) Important Remote Code Execution 5002756 5002469 5002635 Base: 7.8 Temporal: 6.8 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 16.0.5517.1000 Maybe None 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 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 Important Remote Code Execution None Base: 7.8 Temporal: 6.8 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 Unknown Unknown None Microsoft Office LTSC for Mac 2024 Important Remote Code Execution None Base: 7.8 Temporal: 6.8 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 Unknown Unknown None Microsoft SharePoint Enterprise Server 2016 5002778 (Security Update) Important Remote Code Execution Maybe
Microsoft SharePoint Server 2019 5002775 (Security Update) Important Remote Code Execution Maybe

Patches

3 patches
Article Type Restart
Click to Run Security Update No
5002778 Security Update Maybe
5002775 Security Update Maybe

Known Exploits

On This Page