CVE-2026-55136 Details

A vulnerability in Microsoft Office Excel has been identified, allowing an unauthorized attacker to execute code locally on the affected system. This issue arises from an untrusted pointer dereference, which can be exploited by convincing a user to open a malicious Office file. The vulnerability is not applicable when using the Preview Pane.

Users can download the security update for this vulnerability through the Microsoft Update Catalog. Specific update details can be found in the Microsoft Office Security Update Release Notes.