Stack-based buffer overflow in Microsoft Access - CVE-2026-64919
Published: August 12, 2026
Vulnerability identifier: #VU141961
CSH Severity: High
CVSS v4: 8.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-64919
CWE-ID: CWE-121
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to execute arbitrary code.
The vulnerability exists due to stack-based buffer overflow in Microsoft Office Access when parsing a specially crafted Office file. A remote attacker can send a specially crafted file to a user and convince them to open it to execute arbitrary code.
User interaction is required to open the crafted file, and the Preview Pane is not an attack vector.
Affected software
Microsoft Access
How to mitigate CVE-2026-64919
Install security update from vendor's website.
Microsoft Access - update to 16.0.5565.1000