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CVE-2014-1776 is a use-after-free vulnerability in Microsoft Internet Explorer 6 through 11 involving CMarkup::IsConnectedToPrimaryMarkup. Improper access to objects in memory allows specially crafted web content to trigger memory corruption, arbitrary code execution in the current user's security context, or denial of service. Exploitation was observed in April 2014, with initial targeted attacks focusing on Internet Explorer 9 through 11. The observed exploit chain used Adobe Flash for heap manipulation and arbitrary memory access, bypassing ASLR and DEP before executing shellcode. Microsoft addressed the vulnerability in security bulletin MS14-021.
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No public exploit code observed for this vulnerability.
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20 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A use-after-free vulnerability affecting Microsoft Internet Explorer 6–11 that permits remote arbitrary code execution or denial of service through memory corruption. Exploitation was observed in April 2014. Microsoft clarified that VGX.DLL does not contain the vulnerable code, although disabling it blocks known attacks as an exploit-specific workaround.
An Internet Explorer vulnerability for which the supplied script describes temporary mitigations involving security zones, Active Scripting, VGX.DLL permissions, and Enhanced Protected Mode. The content warns that these measures may provide incomplete protection and recommends installing security patches. It does not describe the vulnerability's underlying mechanism or impact.
An Internet Explorer vulnerability addressed by a configuration-assessment script. The content identifies settings that may increase exposure but does not describe the vulnerability's technical mechanism or demonstrate exploitation. Configuration warnings indicate potential risk, not confirmed vulnerability.
A memory corruption vulnerability affecting Internet Explorer 6 through 11 allows a specially crafted webpage to execute arbitrary code with the current user's privileges. Exploitation requires convincing a user to view attacker-controlled content. Administrative users could face complete system compromise. The bulletin rates the vulnerability Critical on affected Windows clients and Moderate on affected Windows servers. Microsoft released the non-cumulative MS14-021 update to correct object handling in memory, using KB2964358 or KB2964444 as applicable. Documented mitigations include unregistering VGX.DLL, restricting ActiveX and Active Scripting, EMET 4.0/4.1, Enhanced Security Configuration, and Enhanced Protected Mode with 64-bit processes on eligible systems.
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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.