Important CVSS 7.8 EPSS 0.02678 2020-08 archive

Executive Summary

A remote code execution vulnerability exists in Microsoft Access software when the software fails to properly handle objects in memory. An attacker who successfully exploited the vulnerability could run arbitrary code in the context of the current user. If the current user is logged on with administrative user rights, an attacker could take control of the affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights. Exploitation of the vulnerability requires that a user open a specially crafted file with an affected version of Microsoft Access. In an email attack scenario, an attacker could exploit the vulnerability by sending the specially crafted file to the user and convincing the user to open the file. The security update addresses the vulnerability by correcting how Microsoft Access handles objects in memory.

Overview

7.8
CVSS HIGH
Important
MS Severity
Not Exploited
MS Exploit Status
Less Likely
MS Exploit Likelihood
Category Remote Code Execution
Released Aug 11 2020
Last Updated Aug 11 2020
Publicly Disclosed No
CISA KEV Not Listed
Known Exploits None Known
EPSS Score 0.02678 — 0.83851 percentile
NVD CVSS 7.8 HIGH — differs from MSRC

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
ATTACK VECTOR
Local
ATTACK COMPLEXITY
Low
PRIVILEGES REQUIRED
Low
USER INTERACTION
None
SCOPE
Unchanged

EPSS Score

0.02678
probability of exploitation in the next 30 days
0.83851 percentile - updated 2026-06-21
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 Access 2010 Service Pack 2 (32-bit editions) 4484385 (Security Update) Important Remote Code Execution Maybe
Microsoft Access 2010 Service Pack 2 (64-bit editions) 4484385 (Security Update) Important Remote Code Execution Maybe
Microsoft Access 2013 Service Pack 1 (32-bit editions) 4484366 (Security Update) Important Remote Code Execution Maybe
Microsoft Access 2013 Service Pack 1 (64-bit editions) 4484366 (Security Update) Important Remote Code Execution Maybe
Microsoft Access 2016 (32-bit edition) 4484340 (Security Update) Important Remote Code Execution Maybe
Microsoft Access 2016 (64-bit edition) 4484340 (Security Update) Important Remote Code Execution Maybe
Microsoft Office 2019 for 32-bit editions Click to Run (Security Update) Important Unknown No
Microsoft Office 2019 for 64-bit editions Click to Run (Security Update) Important Unknown No

Patches

4 patches
Article Type Restart
Click to Run Security Update No
4484385 Security Update Maybe
4484366 Security Update Maybe
4484340 Security Update Maybe

Known Exploits

Acknowledgments

occulteast