CVE-2021-21224

CRITICALNVD 8.89.0▲
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 8.8 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
9.0EG
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS PROB: 56%CVSS: 8.8Exploit: cisa kev · ssvc active · epss top5pct · epss highExposed: 0

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

Type confusion in V8 in Google Chrome prior to 90.0.4430.85 allowed a remote attacker to execute arbitrary code inside a sandbox via a crafted HTML page.

CVSS v3
8.8
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 PROB
56%
EPSS %ILE
99%
KEV
⚠ Exploited

Published

April 26, 2021

Last Modified

October 24, 2025

Advisory Details (7)

Auto-updated Jun 1, 2026
⚠️ Active exploitation confirmed. No patch confirmed yet.
generic

[SECURITY] Fedora 32 Update: chromium-90.0.4430.93-1.fc32 - package-announce - Fedora mailing-lists

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EAJ42L4JFPBJATCZ7MOZQTUDGV4OEHHG/
generic
https://crbug.com/1195777
generic🔴 Active Exploitation

Chrome Releases: Stable Channel Update for Desktop

https://chromereleases.googleblog.com/2021/04/stable-channel-update-for-desktop_20.html
generic

[SECURITY] [DSA 4906-1] chromium security update

https://www.debian.org/security/2021/dsa-4906
generic

Chromium, Google Chrome: Multiple vulnerabilities (GLSA 202104-08) — Gentoo security

https://security.gentoo.org/glsa/202104-08
generic

[SECURITY] Fedora 34 Update: chromium-90.0.4430.93-1.fc34 - package-announce - Fedora mailing-lists

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VUZBGKGVZADNA3I24NVG7HAYYUTOSN5A/
generic

[SECURITY] Fedora 33 Update: chromium-90.0.4430.93-1.fc33 - package-announce - Fedora mailing-lists

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/U3GZ42MYPGD35V652ZPVPYYS7A7LVXVY/

Weakness Classification(1)

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 62× in last 7d / 351× 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 716 total refreshes for this CVE.

  1. 2026-07-28 00:50 UTCVendor advisory
  2. 2026-07-28 00:50 UTCGHSA enrichment
  3. 2026-07-27 20:36 UTCVendor advisory
  4. 2026-07-27 20:36 UTCGHSA enrichment
  5. 2026-07-27 19:24 UTCCISA KEV update
  6. 2026-07-27 17:17 UTCCISA KEV update
  7. 2026-07-27 16:21 UTCVendor advisory
  8. 2026-07-27 16:21 UTCGHSA enrichment
  9. 2026-07-27 12:07 UTCGHSA enrichment
  10. 2026-07-27 07:53 UTCVendor advisory
  11. 2026-07-27 07:53 UTCGHSA enrichment
  12. 2026-07-27 03:39 UTCVendor advisory
  13. 2026-07-27 03:39 UTCGHSA enrichment
  14. 2026-07-26 23:25 UTCVendor advisory
  15. 2026-07-26 23:24 UTCGHSA enrichment
  16. 2026-07-26 19:09 UTCVendor advisory
  17. 2026-07-26 19:09 UTCGHSA enrichment
  18. 2026-07-26 14:55 UTCEG score recompute
  19. 2026-07-26 14:55 UTCVendor advisory
  20. 2026-07-26 14:55 UTCGHSA enrichment
  21. 2026-07-26 14:52 UTCEPSS rescore
  22. 2026-07-26 10:41 UTCEG score recompute
  23. 2026-07-26 10:41 UTCVendor advisory
  24. 2026-07-26 10:41 UTCGHSA enrichment
  25. 2026-07-26 06:26 UTCVendor advisory
Show 75 more
  1. 2026-07-26 06:25 UTCGHSA enrichment
  2. 2026-07-26 02:11 UTCEG score recompute
  3. 2026-07-26 02:11 UTCVendor advisory
  4. 2026-07-26 02:11 UTCGHSA enrichment
  5. 2026-07-25 14:15 UTCEPSS rescore
  6. 2026-07-24 14:15 UTCEPSS rescore
  7. 2026-07-23 14:15 UTCEPSS rescore
  8. 2026-07-23 01:57 UTCEG score recompute
  9. 2026-07-22 22:45 UTCVendor advisory
  10. 2026-07-22 22:44 UTCGHSA enrichment
  11. 2026-07-22 22:43 UTCEG score recompute
  12. 2026-07-22 19:40 UTCCISA KEV update
  13. 2026-07-22 18:28 UTCGHSA enrichment
  14. 2026-07-22 14:14 UTCEG score recompute
  15. 2026-07-22 14:14 UTCVendor advisory
  16. 2026-07-22 14:14 UTCGHSA enrichment
  17. 2026-07-22 14:05 UTCEPSS rescore
  18. 2026-07-22 09:59 UTCVendor advisory
  19. 2026-07-22 09:59 UTCGHSA enrichment
  20. 2026-07-22 05:45 UTCVendor advisory
  21. 2026-07-22 05:45 UTCGHSA enrichment
  22. 2026-07-22 01:31 UTCVendor advisory
  23. 2026-07-22 01:30 UTCGHSA enrichment
  24. 2026-07-21 21:15 UTCVendor advisory
  25. 2026-07-21 21:14 UTCGHSA enrichment
  26. 2026-07-21 16:58 UTCEG score recompute
  27. 2026-07-21 16:58 UTCVendor advisory
  28. 2026-07-21 16:57 UTCGHSA enrichment
  29. 2026-07-21 15:22 UTCEPSS rescore
  30. 2026-07-21 15:22 UTCEPSS rescore
  31. 2026-07-21 14:37 UTCCISA KEV update
  32. 2026-07-21 12:43 UTCVendor advisory
  33. 2026-07-21 12:42 UTCGHSA enrichment
  34. 2026-07-21 08:27 UTCVendor advisory
  35. 2026-07-21 08:27 UTCGHSA enrichment
  36. 2026-07-21 04:12 UTCVendor advisory
  37. 2026-07-21 04:11 UTCGHSA enrichment
  38. 2026-07-20 23:56 UTCVendor advisory
  39. 2026-07-20 23:56 UTCGHSA enrichment
  40. 2026-07-20 19:41 UTCEG score recompute
  41. 2026-07-20 19:41 UTCVendor advisory
  42. 2026-07-20 19:41 UTCGHSA enrichment
  43. 2026-07-20 17:04 UTCEPSS rescore
  44. 2026-07-20 15:28 UTCGHSA enrichment
  45. 2026-07-20 11:13 UTCGHSA enrichment
  46. 2026-07-20 06:59 UTCVendor advisory
  47. 2026-07-20 06:59 UTCGHSA enrichment
  48. 2026-07-20 02:45 UTCVendor advisory
  49. 2026-07-20 02:45 UTCGHSA enrichment
  50. 2026-07-19 22:31 UTCVendor advisory
  51. 2026-07-19 22:31 UTCGHSA enrichment
  52. 2026-07-19 18:17 UTCEG score recompute
  53. 2026-07-19 18:17 UTCVendor advisory
  54. 2026-07-19 18:17 UTCGHSA enrichment
  55. 2026-07-19 14:28 UTCEPSS rescore
  56. 2026-07-19 14:03 UTCVendor advisory
  57. 2026-07-19 14:03 UTCGHSA enrichment
  58. 2026-07-19 09:49 UTCVendor advisory
  59. 2026-07-19 09:49 UTCGHSA enrichment
  60. 2026-07-19 05:35 UTCEG score recompute
  61. 2026-07-19 05:35 UTCVendor advisory
  62. 2026-07-19 05:35 UTCGHSA enrichment
  63. 2026-07-19 02:26 UTCEPSS rescore
  64. 2026-07-19 01:20 UTCGHSA enrichment
  65. 2026-07-18 21:05 UTCVendor advisory
  66. 2026-07-18 21:05 UTCGHSA enrichment
  67. 2026-07-18 16:51 UTCVendor advisory
  68. 2026-07-18 16:51 UTCGHSA enrichment
  69. 2026-07-18 12:37 UTCVendor advisory
  70. 2026-07-18 12:37 UTCGHSA enrichment
  71. 2026-07-18 08:23 UTCVendor advisory
  72. 2026-07-18 08:23 UTCGHSA enrichment
  73. 2026-07-18 04:09 UTCVendor advisory
  74. 2026-07-18 04:09 UTCGHSA enrichment
  75. 2026-07-17 23:55 UTCVendor advisory

Related CVEs(same vendor + same CWE)

Frequently asked(6)

What is CVE-2021-21224?
CVE-2021-21224 is a critical vulnerability published on April 26, 2021. Type confusion in V8 in Google Chrome prior to 90.0.4430.85 allowed a remote attacker to execute arbitrary code inside a sandbox via a crafted HTML page.
When was CVE-2021-21224 disclosed?
CVE-2021-21224 was first published in the National Vulnerability Database on April 26, 2021, with the most recent update on October 24, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2021-21224 actively exploited?
Yes. CISA added CVE-2021-21224 to the Known Exploited Vulnerabilities catalog on November 3, 2021, affecting Google Chromium V8. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2021-21224?
CVE-2021-21224 has a CVSS v3 base score of 8.8 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0.
Which products are affected by CVE-2021-21224?
CVE-2021-21224 affects Google Chromium V8. 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-2021-21224?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-21224, 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-2021-21224

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