CVE-2021-30632

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: 63%CVSS: 8.8Exploit: cisa kev · ssvc active · epss top5pct · epss high · public exploitExposed: 0

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

Out of bounds write in V8 in Google Chrome prior to 93.0.4577.82 allowed a remote attacker to potentially exploit heap corruption 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
63%
EPSS %ILE
99%
KEV
⚠ Exploited

Published

October 8, 2021

Last Modified

October 24, 2025

Advisory Details (5)

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

[SECURITY] Fedora 35 Update: chromium-94.0.4606.61-1.fc35 - package-announce - Fedora mailing-lists

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PM7MOYYHJSWLIFZ4TPJTD7MSA3HSSLV2/
generic

[SECURITY] Fedora 33 Update: chromium-94.0.4606.61-1.fc33 - package-announce - Fedora mailing-lists

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4DDW7HAHTS3SDVXBQUY4SURELO5D4X7R/
generic
https://crbug.com/1247763
generic🔴 Active Exploitation

Chrome Releases: Stable Channel Update for Desktop

https://chromereleases.googleblog.com/2021/09/stable-channel-update-for-desktop.html
generic

Packet Storm

http://packetstormsecurity.com/files/172845/Chrome-JIT-Compiler-Type-Confusion.html

Affected Packages

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
chromium90.0.4430.212-193.0.4577.82-1—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
chromium—93.0.4577.82-1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
chromium—93.0.4577.82-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
chromium—93.0.4577.82-1—

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 102× in last 7d / 414× 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 1,348 total refreshes for this CVE.

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

Publicly available exploits

(1 reference)

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

Frequently asked(6)

What is CVE-2021-30632?
CVE-2021-30632 is a critical vulnerability published on October 8, 2021. Out of bounds write in V8 in Google Chrome prior to 93.0.4577.82 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.
When was CVE-2021-30632 disclosed?
CVE-2021-30632 was first published in the National Vulnerability Database on October 8, 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-2021-30632 actively exploited?
Yes. CISA added CVE-2021-30632 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-2021-30632?
CVE-2021-30632 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-2021-30632?
CVE-2021-30632 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-2021-30632?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-30632, 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-2021-30632

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