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CVE-2022-41128 is a type confusion vulnerability in the Internet Explorer JScript9 engine caused by incorrect just-in-time compiler optimization. Rendering an attacker-controlled website can trigger arbitrary code execution on an affected Windows system. APT37 exploited the vulnerability as a zero-day in October 2022 using malicious Microsoft Office documents that retrieved remote RTF templates and HTML content rendered through Internet Explorer. This delivery mechanism worked even when Internet Explorer was not the default browser and avoided requiring a separate Enhanced Protected Mode sandbox escape. Microsoft patched the vulnerability on November 8, 2022.
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No public exploit code observed for this vulnerability.
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15 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A vulnerability referenced as an Internet Explorer flaw, reported here as exploited by TA-RedAnt during a spear-phishing campaign that delivered RokRAT via LNK files inside a compressed archive.
Identified as a vulnerability recently exploited by Group123. The content provides no vulnerability-specific technical details, affected products, or remediation information.
An Internet Explorer vulnerability cited as an example of APT37's historical zero-day exploitation. The report does not link it to the March 2025 Operation ToyBox Story campaign or explain its technical mechanism.
A patched remote code execution vulnerability in jscript9.dll, the Internet Explorer JavaScript engine, used in targeted attacks via malicious Office documents that fetched remote RTF/HTML content.
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.