Main Vulnerability Database Vulnerabilities #VU164762

Heap-based buffer overflow in Microsoft Office for macOS and Microsoft Office - CVE-2026-110048

Published: November 10, 2026

Vulnerability identifier: #VU164762

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-2026-110048

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 on the victim's system.

The vulnerability exists due to a heap-based buffer overflow in Microsoft Office Word when processing a malicious Office file. A remote attacker can send a specially crafted Office file and convince the victim to open it to execute arbitrary code on the victim's system.

The Preview Pane is not an exploitation vector.

Affected software

Microsoft Office for macOS
Microsoft Office

How to mitigate CVE-2026-110048

Install security update from vendor's website.

Microsoft Office for macOS - update to 16.115.26110837
Microsoft Office - addressed in versions 16.0.14334.21048, 16.0.17932.21140

External References

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2026-110048

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