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CVE-2025-59227 is a use-after-free vulnerability in Microsoft Office that can lead to remote code execution. The flaw affects Office document handling and is reported to be reachable through the Preview Pane, allowing exploitation when a specially crafted Microsoft Office document is processed. Available reporting indicates the vulnerability can be triggered without the victim explicitly opening the malicious file, making preview-based rendering a viable attack path. Successful exploitation results in code execution in the context of the affected Office application on Windows systems.
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What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
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No public exploit code observed for this vulnerability.
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Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
6 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A Microsoft Office remote code execution vulnerability that can be triggered via the Preview Pane without user interaction.
A Microsoft Office remote code execution vulnerability exploitable via a malicious document (including via Preview Pane), enabling attacker code execution on the victim system.
A remote code execution vulnerability in Microsoft Office, allowing remote code execution across multiple Windows versions.
A remote code execution vulnerability in Microsoft Office that can be exploited via the Preview Pane, requiring only that a user previews a malicious document.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.