Out-of-bounds read in Microsoft Office for macOS and Microsoft Office - CVE-2026-56195
Published: July 17, 2026
Vulnerability identifier: #VU138253
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-56195
CWE-ID: CWE-125
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Microsoft
Affected software:
Microsoft Office for macOS
Microsoft Office
Microsoft Office for macOS
Microsoft Office
Detailed vulnerability description
The vulnerability allows a remote attacker to disclose sensitive information.
The vulnerability exists due to out-of-bounds read in Microsoft Office for macOS when parsing a crafted Office file. A remote attacker can send a specially crafted file to the victim to disclose sensitive information.
User interaction is required to open or preview the crafted file, and the Preview Pane is an attack vector.
How to mitigate CVE-2026-56195
Install security update from vendor's website.