Important CVSS 7.8 EPSS 0.0075 2025-12 archive

Executive Summary

Use after free in Microsoft Office Outlook allows an unauthorized attacker to execute code locally.

Overview

7.8
CVSS HIGH
Important
MS Severity
Not Exploited
MS Exploit Status
Exploitation Unlikely
MS Exploit Likelihood
Category Remote Code Execution
Released Dec 9 2025
Last Updated Dec 9 2025
Publicly Disclosed No
CISA KEV Not Listed
Known Exploits None Known
EPSS Score 0.0075 — 0.50092 percentile

CVSS Vector

ATTACK VECTOR
Local
ATTACK COMPLEXITY
Low
PRIVILEGES REQUIRED
None
USER INTERACTION
Required
SCOPE
Unchanged
Temporal Score: 6.8

EPSS Score

0.0075
probability of exploitation in the next 30 days
0.50092 percentile - updated 2026-06-20
View on FIRST.org

Affected Products

14 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 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
Microsoft SharePoint Enterprise Server 2016 5002821 (Security Update) 5002804 (Security Update) Important Remote Code Execution Maybe
Microsoft SharePoint Server 2019 5002816 (Security Update) 5002802 (Security Update) Important Remote Code Execution Maybe
Microsoft Word 2016 (32-bit edition) 5002806 (Security Update) Important Remote Code Execution Maybe
Microsoft Word 2016 (64-bit edition) 5002806 (Security Update) Important Remote Code Execution Maybe

Patches

5 patches
Article Type Restart
Click to Run Security Update No
Release Notes Security Update Maybe
5002821 (Security Update) 5002804 Security Update Maybe
5002816 (Security Update) 5002802 Security Update Maybe
5002806 Security Update Maybe

Known Exploits

Acknowledgments