Main Vulnerability Database Vulnerabilities #VU123788

Untrusted Pointer Dereference in Microsoft products - CVE-2026-26112

Published: March 11, 2026

Vulnerability identifier: #VU123788

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-2026-26112

CWE-ID: CWE-822

Exploitation vector: Remote access

Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to execute arbitrary code on the system.

The vulnerability exists due to untrusted pointer dereference in Microsoft Excel. A remote attacker can trick a victim to open a specially crafted Office file and execute arbitrary code on the target system.

Affected software

Microsoft 365 Apps for Enterprise
Microsoft Office
Microsoft Excel
Microsoft Office LTSC
Office Online Server

How to mitigate CVE-2026-26112

Install updates from vendor's website.

Microsoft Excel - update to 16.0.5543.1000
Office Online Server - update to 16.0.10417.20102

External References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26112

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