Vulnerability Intelligence Report
Microsoft Internet Explorer Memory Corruption Vulnerability
CVE-2014-1776
Use-after-free vulnerability in Microsoft Internet Explorer 6 through 11 allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via vectors related to the CMarkup::IsConnectedToPrimaryMarkup function, as exploited in the wild in April 2014. NOTE: this issue originally emphasized VGX.DLL, but Microsoft clarified that "VGX.DLL does not contain the vulnerable code leveraged in this exploit. Disabling VGX.DLL is an exploit-specific workaround that provides an immediate, effective workaround to help block known attacks."
CISA KEV
SSVC: Active Exploitation
Automatable
CVSS Base Score
9.8
CRITICAL
Exploitability:3.9
Impact Score:5.9
EPSS Probability:88.01%
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
—
Authentication
—
Weaponization
—
SSVC Action
—
Weaknesses (CWE)
CWE-416 ↗CWE-416 Use After Free
Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| microsoft | internet_explorer | 6, 7, 8, 9, 10, 11 |
| microsoft | windows_server_2003 | all |
| microsoft | windows_xp | all |
| microsoft | windows_server_2008 | r2 |
| microsoft | windows_vista | all |
| microsoft | windows_7 | all |
| microsoft | windows_8 | all |
| microsoft | windows_rt | all |
| microsoft | windows_server_2012 | r2 |
| microsoft | windows_8.1 | all |
| microsoft | windows_rt_8.1 | all |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | Microsoft Corporation · Vendor · USA |
| Reserved | 2014-01-29T00:00:00 |
| Published | 2014-04-27T10:00:00 |
| Patch Date | 2014-04-26 |
| Last Updated | 2025-10-22T00:05:37 |
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