CVE-2019-1429

HIGHNVD 7.59.0▲
EchelonGraph scoreHIGH confidence

Score elevated to 9.0 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2021-11-03), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 7.5 retained for reference. Confidence: HIGH.

Triggered by: CISA KEV (actively exploited)
Sources: cisa_kev, epss, ghsa, nvd
Trending — 5 sources updated this weekExploited in the wild
7.5
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS: 73%CVSS: 7.5Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

A remote code execution vulnerability exists in the way that the scripting engine handles objects in memory in Internet Explorer, aka 'Scripting Engine Memory Corruption Vulnerability'. This CVE ID is unique from CVE-2019-1426, CVE-2019-1427, CVE-2019-1428.

CVSS v3
7.5
EG Score
9.0(high)
EG Risk
81(Attend)
EG Risk 81/100SSVC: Attend

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
Severity90% × 45%
Exploitation100% × 40%
Automatability0% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS
99.4%
KEV
⚠ Exploited

Published

November 12, 2019

Last Modified

January 14, 2026

Advisory Details (3)

Auto-updated Jun 6, 2026
⚠️ Active exploitation confirmed. Patch available. Sources: microsoft, cisa.
cisa Patch Available🔴 Active Exploitation

Known Exploited Vulnerabilities Catalog | CISA

Known Exploited Vulnerabilities Catalog | CISA. Listed in CISA Known Exploited Vulnerabilities catalog.

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-1429
microsoft Patch Available

Security Update Guide - Microsoft Security Response Center

Security Update Guide - Microsoft Security Response Center. Patch available via Microsoft Security Update

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1429
generic

Packet Storm

http://packetstormsecurity.com/files/155433/Microsoft-Internet-Explorer-Use-After-Free.html

Weakness Classification(2)

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

All Vendor Advisories

(1)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 79× in last 7d / 379× 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 692 total refreshes for this CVE.

  1. 2026-07-23 14:15 UTCEPSS rescore
  2. 2026-07-23 01:40 UTCEG score recompute
  3. 2026-07-22 22:20 UTCEG score recompute
  4. 2026-07-22 20:51 UTCGHSA enrichment
  5. 2026-07-22 19:40 UTCCISA KEV update
  6. 2026-07-22 16:53 UTCEG score recompute
  7. 2026-07-22 16:53 UTCVendor advisory
  8. 2026-07-22 16:53 UTCGHSA enrichment
  9. 2026-07-22 14:05 UTCEPSS rescore
  10. 2026-07-22 12:53 UTCVendor advisory
  11. 2026-07-22 12:53 UTCGHSA enrichment
  12. 2026-07-22 08:56 UTCVendor advisory
  13. 2026-07-22 08:56 UTCGHSA enrichment
  14. 2026-07-22 04:59 UTCVendor advisory
  15. 2026-07-22 04:59 UTCGHSA enrichment
  16. 2026-07-22 01:02 UTCVendor advisory
  17. 2026-07-22 01:02 UTCGHSA enrichment
  18. 2026-07-21 21:04 UTCVendor advisory
  19. 2026-07-21 21:04 UTCGHSA enrichment
  20. 2026-07-21 17:06 UTCEG score recompute
  21. 2026-07-21 17:06 UTCVendor advisory
  22. 2026-07-21 17:06 UTCGHSA enrichment
  23. 2026-07-21 15:22 UTCEPSS rescore
  24. 2026-07-21 15:22 UTCEPSS rescore
  25. 2026-07-21 14:37 UTCCISA KEV update
Show 75 more
  1. 2026-07-21 13:09 UTCVendor advisory
  2. 2026-07-21 13:09 UTCGHSA enrichment
  3. 2026-07-21 09:10 UTCVendor advisory
  4. 2026-07-21 09:10 UTCGHSA enrichment
  5. 2026-07-21 05:12 UTCVendor advisory
  6. 2026-07-21 05:12 UTCGHSA enrichment
  7. 2026-07-21 01:14 UTCVendor advisory
  8. 2026-07-21 01:14 UTCGHSA enrichment
  9. 2026-07-20 21:17 UTCVendor advisory
  10. 2026-07-20 21:16 UTCGHSA enrichment
  11. 2026-07-20 17:18 UTCEG score recompute
  12. 2026-07-20 17:18 UTCVendor advisory
  13. 2026-07-20 17:18 UTCGHSA enrichment
  14. 2026-07-20 17:04 UTCEPSS rescore
  15. 2026-07-20 17:04 UTCEPSS rescore
  16. 2026-07-20 13:20 UTCGHSA enrichment
  17. 2026-07-20 09:23 UTCVendor advisory
  18. 2026-07-20 09:23 UTCGHSA enrichment
  19. 2026-07-20 05:25 UTCVendor advisory
  20. 2026-07-20 05:25 UTCGHSA enrichment
  21. 2026-07-20 01:28 UTCVendor advisory
  22. 2026-07-20 01:28 UTCGHSA enrichment
  23. 2026-07-19 21:30 UTCVendor advisory
  24. 2026-07-19 21:30 UTCGHSA enrichment
  25. 2026-07-19 17:32 UTCVendor advisory
  26. 2026-07-19 17:32 UTCGHSA enrichment
  27. 2026-07-19 13:35 UTCVendor advisory
  28. 2026-07-19 13:35 UTCGHSA enrichment
  29. 2026-07-19 09:36 UTCVendor advisory
  30. 2026-07-19 09:36 UTCGHSA enrichment
  31. 2026-07-19 05:39 UTCVendor advisory
  32. 2026-07-19 05:39 UTCGHSA enrichment
  33. 2026-07-19 01:40 UTCGHSA enrichment
  34. 2026-07-18 21:42 UTCVendor advisory
  35. 2026-07-18 21:42 UTCGHSA enrichment
  36. 2026-07-18 17:45 UTCVendor advisory
  37. 2026-07-18 17:45 UTCGHSA enrichment
  38. 2026-07-18 13:48 UTCVendor advisory
  39. 2026-07-18 13:48 UTCGHSA enrichment
  40. 2026-07-18 09:50 UTCVendor advisory
  41. 2026-07-18 09:50 UTCGHSA enrichment
  42. 2026-07-18 05:52 UTCVendor advisory
  43. 2026-07-18 05:52 UTCGHSA enrichment
  44. 2026-07-18 01:55 UTCVendor advisory
  45. 2026-07-18 01:55 UTCGHSA enrichment
  46. 2026-07-17 21:58 UTCVendor advisory
  47. 2026-07-17 21:57 UTCGHSA enrichment
  48. 2026-07-17 18:00 UTCVendor advisory
  49. 2026-07-17 18:00 UTCGHSA enrichment
  50. 2026-07-17 14:01 UTCVendor advisory
  51. 2026-07-17 14:01 UTCGHSA enrichment
  52. 2026-07-17 10:04 UTCEG score recompute
  53. 2026-07-17 10:04 UTCVendor advisory
  54. 2026-07-17 10:04 UTCGHSA enrichment
  55. 2026-07-17 06:07 UTCVendor advisory
  56. 2026-07-17 06:07 UTCGHSA enrichment
  57. 2026-07-17 02:10 UTCVendor advisory
  58. 2026-07-17 02:10 UTCGHSA enrichment
  59. 2026-07-16 22:13 UTCVendor advisory
  60. 2026-07-16 22:13 UTCGHSA enrichment
  61. 2026-07-16 18:16 UTCGHSA enrichment
  62. 2026-07-16 17:04 UTCCISA KEV update
  63. 2026-07-16 16:59 UTCEPSS rescore
  64. 2026-07-16 16:59 UTCEPSS rescore
  65. 2026-07-16 14:17 UTCVendor advisory
  66. 2026-07-16 14:17 UTCGHSA enrichment
  67. 2026-07-16 10:20 UTCVendor advisory
  68. 2026-07-16 10:20 UTCGHSA enrichment
  69. 2026-07-16 06:22 UTCVendor advisory
  70. 2026-07-16 06:22 UTCGHSA enrichment
  71. 2026-07-16 02:23 UTCVendor advisory
  72. 2026-07-16 02:23 UTCGHSA enrichment
  73. 2026-07-15 22:26 UTCVendor advisory
  74. 2026-07-15 22:26 UTCGHSA enrichment
  75. 2026-07-15 18:29 UTCVendor advisory

Publicly available exploits

(1 reference)

Working exploit code is in the public domain (1 Exploit-DB entry). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Exploit-DBEDB-47707✓ verified
    First seen Nov 22, 2019

    Internet Explorer - Use-After-Free in JScript Arguments During toJSON Callback

    Open source ↗

Related CVEs(same vendor + same CWE)

Frequently asked(6)

What is CVE-2019-1429?
CVE-2019-1429 is a high vulnerability published on November 12, 2019. A remote code execution vulnerability exists in the way that the scripting engine handles objects in memory in Internet Explorer, aka 'Scripting Engine Memory Corruption Vulnerability'. This CVE ID is unique from CVE-2019-1426, CVE-2019-1427, CVE-2019-1428.
When was CVE-2019-1429 disclosed?
CVE-2019-1429 was first published in the National Vulnerability Database on November 12, 2019, with the most recent update on January 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2019-1429 actively exploited?
Yes. CISA added CVE-2019-1429 to the Known Exploited Vulnerabilities catalog on November 3, 2021, affecting Microsoft Internet Explorer. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2019-1429?
CVE-2019-1429 has a CVSS v3 base score of 7.5 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0.
Which products are affected by CVE-2019-1429?
CVE-2019-1429 affects Microsoft Internet Explorer. The full affected-products list, including version ranges and fixed versions, is shown in the Affected Packages section of this page.
How do I remediate CVE-2019-1429?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2019-1429, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2019-1429

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