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CVE-2025-21298 is a critical Windows OLE remote code execution vulnerability associated with handling of specially crafted RTF content. The available reporting indicates the flaw can be triggered through Microsoft Outlook’s Preview Pane, meaning a malicious email containing crafted RTF content can invoke vulnerable OLE processing without the victim opening an attachment or clicking a link. The issue is described as a zero-click RCE condition in Windows OLE/RTF handling, with public reporting assigning it a CVSS base score of 9.8.
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No valid public exploits. Mallory filtered out 8 candidates as fakes, detection scripts, or README-only repos.
All candidate exploits were filtered out by Mallory's validation.
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Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
7 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A critical Windows OLE remote code execution vulnerability involving RTF content that can be triggered via the Preview Pane in email clients such as Outlook, enabling code execution from a malicious email without user clicks.
A critical Windows OLE remote code execution flaw involving RTF content that can be triggered via Outlook Preview Pane by sending a malicious email, making it highly dangerous and likely to be exploited soon.
A critical Windows OLE vulnerability allowing zero-click remote code execution via malicious RTF documents in Microsoft Outlook.
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.
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Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.