Heap-based buffer overflow in Microsoft Access - CVE-2026-64906
Published: August 12, 2026
Vulnerability identifier: #VU141950
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-2026-64906
CWE-ID: CWE-122
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 heap-based buffer overflow in Microsoft Office Access when parsing a crafted Office file. A remote attacker can send a specially crafted file to a victim 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-2026-64906
Install security update from vendor's website.
Microsoft Access - update to 16.0.5565.1000