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CVE-2025-49702 is a critical remote code execution vulnerability in Microsoft Office caused by type confusion, classified as CWE-843. The flaw arises from access to a resource using an incompatible type and can allow an unauthorized attacker to execute code in the context of the affected Office application. Although categorized as remote code execution, exploitation is carried out locally on the target system after delivery of a malicious Office document. Microsoft indicated that the Preview Pane can also serve as an attack vector, meaning code execution may be triggered during document preview rather than only through full document opening. The vulnerability affects Microsoft Office, including Office LTSC for Mac 2021 and 2024, for which updates were later made available.
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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.
4 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A Microsoft Office remote code execution vulnerability affecting Office/365, including Mac versions, with Preview Pane as an exploitation vector.
A critical Microsoft Office type confusion vulnerability that allows unauthorized local code execution, typically by convincing a user to open a malicious Office file; the Preview Pane can also serve as an attack vector.
A remote code execution vulnerability in Microsoft Office/Microsoft Word.
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.