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CVE-2024-38178 is a memory corruption vulnerability in the Microsoft Windows Scripting Engine, specifically involving the legacy Internet Explorer JavaScript engine component jscript9.dll used by Edge in Internet Explorer Mode and by applications embedding Internet Explorer-based WebView functionality. The flaw is described as a type confusion condition caused by incorrect interpretation of data types during JavaScript optimization, which can corrupt memory and permit attacker-controlled code execution. Public reporting indicates the vulnerability was exploited as a zero-day in attacks that delivered malicious script content through software components still rendering content with the deprecated Internet Explorer engine. Microsoft assigned the issue a CVSS score of 7.5 and patched it in August 2024.
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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.
18 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A Microsoft zero-day browser vulnerability discussed in connection with APT37.
A zero-day vulnerability exploited in the wild in 2024, attributed to North Korean state-sponsored and financially motivated groups.
A memory corruption vulnerability in the Windows Scripting Engine (jscript9.dll) that allows remote code execution when using Edge in Internet Explorer Mode. Exploitation requires user interaction via a crafted URL and has been used in targeted attacks by ScarCruft (APT37) to deliver malware.
A zero-day type confusion vulnerability in Microsoft Internet Explorer's JavaScript engine (jscript9.dll), exploitable via IE-based WebView components in toast advertising software, enabling zero-click compromise and malware infection.
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.