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A security feature bypass vulnerability in the Windows MSHTML Platform allows an attacker to circumvent COM/OLE and OLE-related protections used by Microsoft 365 and Microsoft Office. Successful exploitation relies on delivering a specially crafted malicious file or document to a victim and inducing the victim to load or open it on a vulnerable Windows system. The flaw can bypass intended security controls in the MSHTML/OLE handling path and enable subsequent arbitrary code execution in the context of the logged-in user. The vulnerability has been reported as actively exploited in the wild.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
5 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Actively exploited zero-day vulnerability in the Windows MSHTML Platform that allows bypass of COM/OLE security controls and subsequent code execution, requiring user interaction to download a crafted file.
A Windows MSHTML platform security feature bypass that can be leveraged to achieve code execution in the context of the user via social engineering with a specially crafted file/document; noted as actively exploited in the wild.
A Windows MSHTML platform security feature bypass that can bypass OLE mitigations in Microsoft 365/Office, enabling code execution via malicious documents under the user context.
A security feature bypass vulnerability in the Windows MSHTML platform.
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.