High severity · published Sep 8, 2026
CVE-2026-69477
Microsoft Office Access Remote Code Execution Vulnerability
7.3
CVSS
0.4%
EPSS
No
On KEV
Description
Heap-based buffer overflow in Microsoft Office Access allows an authorized attacker to execute code locally.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 37% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
OF
Office · Microsoft
All versions, or not specified · source: NVD
M3
Microsoft 365 Apps for Enterprise · Microsoft
16.0.1 before 16.0.20326.20138 · source: vendor
MA
Microsoft Access 2016 · Microsoft
16.0.0 before 16.0.5569.1000 · source: vendor
MA
Microsoft Access 2016 (32-bit edition) · Microsoft
16.0.0 before 16.0.5569.1000 · source: vendor
MO
Microsoft Office 2019 · Microsoft
19.0.0 before 16.0.10417.20207 · source: vendor
MO
Microsoft Office LTSC 2021 · Microsoft
16.0.1 before 16.0.14334.20906 · source: vendor
MO
Microsoft Office LTSC 2024 · Microsoft
16.0.0 before 16.0.17932.20976 · source: vendor
AC
Access · Microsoft
2016; 2016 · source: NVD
O2
Office 2019 · Microsoft
All versions, or not specified · source: NVD
O2
Office 2021 · Microsoft
All versions, or not specified · source: NVD
O2
Office 2024 · Microsoft
All versions, or not specified · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-69477
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-69477
vendor-advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69477
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