CVE-2014-1776Use-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…
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It affects microsoft internet_explorer. Add what you run to find out whether that includes you.
CISA lists it as known exploited since Jan 28, 2022; federal agencies had to remediate by Jul 28, 2022. Treat that date as your deadline.
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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."
- CVSS
- 9.8 CRITICAL (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-416
- Known exploited
- Added to CISA KEV Jan 28, 2022; federal remediation due Jul 28, 2022Apply updates per vendor instructions.
- EPSS (exploitation in the next 30 days)
- 82.68% (percentile 100)
- Assigned by
- microsoft
- NVD analysis
- Analyzed
- Record last updated
- Oct 22, 2025
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
microsoft internet_explorer microsoft:internet_explorer | 6; 7; 8; 9; 10; 11 | NVD |
References
- http://securitytracker.com/id?1030154vdb-entry, x-refsource-sectrack, broken-link, third-party-advisory
- http://www.osvdb.org/106311vdb-entry, x-refsource-osvdb, broken-link
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2014/ms14-021vendor-advisory, x-refsource-ms, patch
- http://blogs.technet.com/b/srd/archive/2014/04/30/protection-strategies-for-the-security-advisory-2963983-ie-0day.aspxx-refsource-confirm, broken-link, mitigation
- http://secunia.com/advisories/57908third-party-advisory, x-refsource-secunia, broken-link
- http://www.signalsec.com/cve-2014-1776-ie-0day-analysis/x-refsource-misc, exploit, third-party-advisory
- http://www.fireeye.com/blog/uncategorized/2014/04/new-zero-day-exploit-targeting-internet-explorer-versions-9-through-11-identified-in-targeted-attacks.htmlx-refsource-misc, broken-link
- http://www.kb.cert.org/vuls/id/222929third-party-advisory, x-refsource-cert-vn, mitigation, us-government-resource
- https://technet.microsoft.com/library/security/2963983x-refsource-confirm, mitigation, patch, vendor-advisory
- http://www.securityfocus.com/bid/67075vdb-entry, x-refsource-bid, broken-link, third-party-advisory
- https://www.vicarius.io/vsociety/posts/cve-2014-1776-use-after-free-vulnerability-in-microsoft-internet-explorer-detection-scriptthird-party-advisory
- https://www.vicarius.io/vsociety/posts/cve-2014-1776-use-after-free-vulnerability-in-microsoft-internet-explorer-mitigation-scriptsthird-party-advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2014-1776us-government-resource
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.