CVE-2014-1776

CRITICALNVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score elevated to 9.8 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2022-01-28), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 9.8 retained for reference. Confidence: HIGH.

Triggered by: CISA KEV (actively exploited)
Sources: cisa_kev, epss, ghsa, nvd
Trending — 3 sources updated this weekExploited in the wild
9.8EG
EchelonGraph verdictMitigate nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS PROB: 83%CVSS: 9.8Exploit: cisa kev · ssvc active · epss top5pct · epss highExposed services: Not assessed

A fix is referenced (a reference tagged "Patch", often a source commit), but no release containing it is confirmed — find the release that contains it; until it is applied, mitigate (WAF / firewall / segmentation).

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 v3
9.8
EG Score
9.8CRITICALhigh confidence
EG Risk
99
EG Risk 99/100CISA SSVC

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity98% × 45%
Exploitation100% × 40%
Automatability100% × 15%
CISA SSVC: Attend at low mission impact; Act at medium or high.
Action: A fix is referenced, but no release containing it is confirmed. Check the referenced fix and the vendor's advisory for a release that contains it and apply that sooner than your standard update timelines at low mission impact and as soon as possible at medium or high; until then, restrict network exposure of the affected system or apply the vendor's mitigation.
EPSS PROB
83%
EPSS %ILE
99th
KEV
⚠ Exploited

CISA SSVCAttend at low mission impact; Act at medium or high.

A fix is referenced, but no release containing it is confirmed. Check the referenced fix and the vendor's advisory for a release that contains it and apply that sooner than your standard update timelines at low mission impact and as soon as possible at medium or high; until then, restrict network exposure of the affected system or apply the vendor's mitigation.

Exploitation active (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

April 27, 2014

Last Modified

April 21, 2026

Advisory Details (8)

Auto-updated Oct 1, 2026
⚠️ Active exploitation confirmed. Fix referenced — no release confirmed yet. Sources: cert.
generic

Microsoft Security Advisory 2963983 | Microsoft Learn

https://technet.microsoft.com/library/security/2963983
generic

Microsoft Security Bulletin MS14-021 - Critical | Microsoft Learn

https://docs.microsoft.com/en-us/security-updates/securitybulletins/2014/ms14-021
generic🔴 Active Exploitation

CVE-2014-1776 (IE 0day) Analysis | SignalSEC Corp.

http://www.signalsec.com/cve-2014-1776-ie-0day-analysis/
generic🔴 Active Exploitation

CVE-2014-1776 - PSIRT.COM

http://www.securityfocus.com/bid/67075
cert🔴 Active Exploitation

VU#222929 - Microsoft Internet Explorer CMarkup use-after-free vulnerability

http://www.kb.cert.org/vuls/id/222929
generic

Secunia Research & Vulnerability Insights | Flexera

http://secunia.com/advisories/57908
generic

Archived MSDN and TechNet Blogs | Microsoft Learn

http://blogs.technet.com/b/srd/archive/2014/04/30/protection-strategies-for-the-security-advisory-2963983-ie-0day.aspx
generic
http://securitytracker.com/id?1030154

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 44× in last 7d / 212× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 912 total refreshes for this CVE.

  1. 2026-10-06 06:22 UTCGHSA enrichment
  2. 2026-10-06 02:22 UTCGHSA enrichment
  3. 2026-10-05 22:22 UTCGHSA enrichment
  4. 2026-10-05 18:19 UTCEG score recompute
  5. 2026-10-05 18:19 UTCGHSA enrichment
  6. 2026-10-05 17:38 UTCEPSS rescore
  7. 2026-10-05 14:19 UTCGHSA enrichment
  8. 2026-10-05 10:20 UTCGHSA enrichment
  9. 2026-10-05 06:20 UTCGHSA enrichment
  10. 2026-10-05 02:20 UTCGHSA enrichment
  11. 2026-10-04 22:20 UTCGHSA enrichment
  12. 2026-10-04 18:20 UTCGHSA enrichment
  13. 2026-10-04 14:18 UTCGHSA enrichment
  14. 2026-10-04 10:16 UTCGHSA enrichment
  15. 2026-10-04 06:16 UTCGHSA enrichment
  16. 2026-10-04 02:16 UTCGHSA enrichment
  17. 2026-10-03 22:16 UTCGHSA enrichment
  18. 2026-10-03 18:15 UTCGHSA enrichment
  19. 2026-10-03 14:13 UTCGHSA enrichment
  20. 2026-10-03 10:13 UTCGHSA enrichment
  21. 2026-10-03 06:13 UTCGHSA enrichment
  22. 2026-10-03 02:13 UTCGHSA enrichment
  23. 2026-10-02 22:13 UTCGHSA enrichment
  24. 2026-10-02 18:14 UTCEG score recompute
  25. 2026-10-02 18:14 UTCGHSA enrichment
Show 75 more
  1. 2026-10-02 14:12 UTCGHSA enrichment
  2. 2026-10-02 10:11 UTCGHSA enrichment
  3. 2026-10-02 06:11 UTCGHSA enrichment
  4. 2026-10-02 02:11 UTCGHSA enrichment
  5. 2026-10-01 22:08 UTCGHSA enrichment
  6. 2026-10-01 18:05 UTCGHSA enrichment
  7. 2026-10-01 14:02 UTCGHSA enrichment
  8. 2026-10-01 10:02 UTCGHSA enrichment
  9. 2026-10-01 06:03 UTCGHSA enrichment
  10. 2026-10-01 02:03 UTCGHSA enrichment
  11. 2026-09-30 22:02 UTCGHSA enrichment
  12. 2026-09-30 18:02 UTCGHSA enrichment
  13. 2026-09-30 14:02 UTCGHSA enrichment
  14. 2026-09-30 10:03 UTCGHSA enrichment
  15. 2026-09-30 06:04 UTCGHSA enrichment
  16. 2026-09-30 02:04 UTCGHSA enrichment
  17. 2026-09-29 22:05 UTCGHSA enrichment
  18. 2026-09-29 18:03 UTCGHSA enrichment
  19. 2026-09-29 13:58 UTCGHSA enrichment
  20. 2026-09-29 09:58 UTCGHSA enrichment
  21. 2026-09-29 05:58 UTCGHSA enrichment
  22. 2026-09-29 01:58 UTCGHSA enrichment
  23. 2026-09-28 21:59 UTCEG score recompute
  24. 2026-09-28 21:59 UTCGHSA enrichment
  25. 2026-09-28 17:59 UTCGHSA enrichment
  26. 2026-09-28 13:58 UTCGHSA enrichment
  27. 2026-09-28 09:58 UTCGHSA enrichment
  28. 2026-09-28 05:59 UTCGHSA enrichment
  29. 2026-09-28 01:59 UTCGHSA enrichment
  30. 2026-09-27 21:59 UTCGHSA enrichment
  31. 2026-09-27 21:51 UTCCISA KEV update
  32. 2026-09-27 18:00 UTCGHSA enrichment
  33. 2026-09-27 13:59 UTCGHSA enrichment
  34. 2026-09-27 09:56 UTCGHSA enrichment
  35. 2026-09-27 05:57 UTCGHSA enrichment
  36. 2026-09-27 01:56 UTCGHSA enrichment
  37. 2026-09-26 21:56 UTCGHSA enrichment
  38. 2026-09-26 17:56 UTCEG score recompute
  39. 2026-09-26 17:56 UTCGHSA enrichment
  40. 2026-09-26 15:53 UTCEPSS rescore
  41. 2026-09-26 13:56 UTCGHSA enrichment
  42. 2026-09-26 09:53 UTCGHSA enrichment
  43. 2026-09-26 05:51 UTCGHSA enrichment
  44. 2026-09-26 01:46 UTCEG score recompute
  45. 2026-09-26 01:46 UTCGHSA enrichment
  46. 2026-09-25 21:43 UTCGHSA enrichment
  47. 2026-09-25 19:35 UTCCISA KEV update
  48. 2026-09-25 17:40 UTCGHSA enrichment
  49. 2026-09-25 14:55 UTCCISA KEV update
  50. 2026-09-25 13:36 UTCGHSA enrichment
  51. 2026-09-25 09:34 UTCGHSA enrichment
  52. 2026-09-25 05:34 UTCGHSA enrichment
  53. 2026-09-25 01:35 UTCGHSA enrichment
  54. 2026-09-24 21:35 UTCGHSA enrichment
  55. 2026-09-24 19:31 UTCCISA KEV update
  56. 2026-09-24 17:35 UTCEG score recompute
  57. 2026-09-24 17:35 UTCGHSA enrichment
  58. 2026-09-24 13:35 UTCGHSA enrichment
  59. 2026-09-24 09:35 UTCGHSA enrichment
  60. 2026-09-24 05:35 UTCGHSA enrichment
  61. 2026-09-24 01:35 UTCGHSA enrichment
  62. 2026-09-23 21:36 UTCGHSA enrichment
  63. 2026-09-23 17:36 UTCEG score recompute
  64. 2026-09-23 17:36 UTCGHSA enrichment
  65. 2026-09-23 13:37 UTCGHSA enrichment
  66. 2026-09-23 09:36 UTCGHSA enrichment
  67. 2026-09-23 05:36 UTCGHSA enrichment
  68. 2026-09-23 01:37 UTCGHSA enrichment
  69. 2026-09-22 21:37 UTCGHSA enrichment
  70. 2026-09-22 19:36 UTCCISA KEV update
  71. 2026-09-22 17:38 UTCEG score recompute
  72. 2026-09-22 17:38 UTCGHSA enrichment
  73. 2026-09-22 13:35 UTCGHSA enrichment
  74. 2026-09-22 09:35 UTCGHSA enrichment
  75. 2026-09-22 05:35 UTCGHSA enrichment

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Frequently asked(6)

What is CVE-2014-1776?
CVE-2014-1776 is a critical vulnerability published on April 27, 2014. 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…
When was CVE-2014-1776 disclosed?
CVE-2014-1776 was first published on April 27, 2014, with the most recent update on April 21, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2014-1776 actively exploited?
Yes. CISA added CVE-2014-1776 to the Known Exploited Vulnerabilities catalog on January 28, 2022, affecting Microsoft Internet Explorer. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate attention. A fix is referenced, but no release containing it is confirmed. Check the referenced fix and the vendor's advisory for a release that contains it and apply that; until then, restrict network exposure of the affected system or apply the vendor's mitigation.
What is the CVSS score of CVE-2014-1776?
CVE-2014-1776 has a CVSS v3 base score of 9.8 (NVD).
Which products are affected by CVE-2014-1776?
CVE-2014-1776 affects Microsoft Internet Explorer.
How do I remediate CVE-2014-1776?
A fix for CVE-2014-1776 is referenced (a reference tagged "Patch", often a source commit), but EchelonGraph has no release containing it on record. Check that reference and the vendor's advisory for a release that contains the fix and update to it; until then, restrict network exposure of the affected system or apply the vendor's mitigation.

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