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: 84%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
84%
EPSS %ILE
100%
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/

Affected Packages

(5 across 5 ecosystems)
Debian:10(1)
PackageVulnerable rangeFixed inDependents
chromium73.0.3683.75-1 ... 90.0.4430.72-1 (64 versions)90.0.4430.85-1~deb10u1—
Debian:11(1)
PackageVulnerable rangeFixed inDependents
chromium—90.0.4430.85-1—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
chromium—90.0.4430.85-1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
chromium—90.0.4430.85-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
chromium—90.0.4430.85-1—

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 93× in last 7d / 373× 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 1,376 total refreshes for this CVE.

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

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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2021-21224

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