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CVE-2025-49699 is a Microsoft Office remote code execution vulnerability caused by a use-after-free condition. Microsoft classifies the weakness as CWE-416. Successful exploitation occurs when a victim opens a specially crafted malicious Office document, triggering memory corruption that can lead to arbitrary code execution in the context of the local user. Although categorized as a remote code execution issue because the attacker can deliver the malicious file from a remote location, the exploit is carried out locally on the victim system after user interaction. Microsoft states that the Preview Pane is not an attack vector for this vulnerability. The issue was rated Important, assigned CVSS 3.1 base score 7.0, and assessed as less likely to be exploited.
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What an attacker gets, and what they’ve been doing with it.
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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.
3 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 and additionally impacting Word, PowerPoint, and Outlook in product listings; Mac versions were also affected.
A use-after-free remote code execution vulnerability in Microsoft Office that allows an unauthorized attacker to execute code locally when a user opens a malicious Office file.
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.