preview pane attack

A preview pane attack exploits vulnerabilities in Microsoft Office's Preview Pane feature, allowing remote code execution without opening a file. The tag covers threats like CVE-2026-40363, a critical heap-based buffer overflow affecting Microsoft 365 Apps, Office 2016, 2019, LTSC 2021/2024, and Office for Mac and Android. Microsoft rates exploitation as less likely but confirms the Preview Pane as an attack vector, urging administrators to patch and verify systems. Discussions focus on the risk of simply previewing a document, the affected versions, and mitigation steps. This tag is relevant for IT professionals and security teams managing Office deployments and seeking to understand and defend against preview pane-based attacks.