Intelligence online17 sources monitored8 actively exploited 7d26 published 24hChecked recently
Vulnerability record

CVE-2014-1776

Microsoft Internet Explorer Memory Corruption Vulnerability

CriticalExploitation confirmedCISA KEV
What should I do?

This vulnerability is in the CISA Known Exploited Vulnerabilities catalog: attackers are using it. If you run Internet Explorer, fix it now.

CISA required action: Apply updates per vendor instructions.

US federal civilian agencies must remediate by Jul 28, 2022.

Patch status

Official fix available since

Apply the vendor's update to every affected system. Check the fixed-in versions below where known.

Basis: NVD patch reference

Description

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."

Source: NIST National Vulnerability Database. Official vulnerability data, reproduced as published.

Affected products

ProductVendorAffected versionsSource
Internet ExplorerMicrosoft6; 7; 8; 9; 10; 11KEV

Sources: KEV = CISA Known Exploited Vulnerabilities catalog.

Intelligence timeline

Developments from the last 30 days, newest first.

  1. CVSS scoredUpdateKEV

    CVE-2014-1776 scored CVSS 9.8: Microsoft Internet Explorer, Microsoft Internet Explorer Memory Corruption Vulnerability

    CISA lists this as exploited in the wild. Unpatched Internet Explorer systems are exposed to active attacks now.

    Basis: NIST National Vulnerability Database

  2. Patch releasedUpdateKEV

    Patch released for CVE-2014-1776: Microsoft Internet Explorer, Microsoft Internet Explorer Memory Corruption Vulnerability

    An official fix is now available for Microsoft Internet Explorer. This vulnerability is being exploited, so apply it promptly.

    Basis: NVD patch reference

1 earlier event is available with a subscription. See plans.

Coverage

We have not published a story about this vulnerability yet.

References

  • learn.microsoft.com https://learn.microsoft.com/en-us/security-updates/SecurityBulletins/2014/ms14-021?redirectedfrom=MSDN
  • nvd.nist.gov https://nvd.nist.gov/vuln/detail/CVE-2014-1776
  • blogs.technet.com http://blogs.technet.com/b/srd/archive/2014/04/30/protection-strategies-for-the-security-advisory-2963983-ie-0…
  • secunia.com http://secunia.com/advisories/57908
  • securitytracker.com http://securitytracker.com/id?1030154
  • fireeye.com http://www.fireeye.com/blog/uncategorized/2014/04/new-zero-day-exploit-targeting-internet-explorer-versions-9-…
  • kb.cert.org http://www.kb.cert.org/vuls/id/222929
  • osvdb.org http://www.osvdb.org/106311
  • securityfocus.com http://www.securityfocus.com/bid/67075
  • signalsec.com http://www.signalsec.com/cve-2014-1776-ie-0day-analysis/
  • docs.microsoft.com https://docs.microsoft.com/en-us/security-updates/securitybulletins/2014/ms14-021
  • technet.microsoft.com https://technet.microsoft.com/library/security/2963983
  • vicarius.io https://www.vicarius.io/vsociety/posts/cve-2014-1776-use-after-free-vulnerability-in-microsoft-internet-explor…
  • vicarius.io https://www.vicarius.io/vsociety/posts/cve-2014-1776-use-after-free-vulnerability-in-microsoft-internet-explor…
  • cisa.gov https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2014-1776