CVE-2021-37975

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: 35%CVSS: 8.8Exploit: NoneExposed: 0

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

Use after free in V8 in Google Chrome prior to 94.0.4606.71 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
35%
EPSS %ILE
98%
KEV
⚠ Exploited

Published

October 8, 2021

Last Modified

October 24, 2025

Advisory Details (7)

Auto-updated Jun 2, 2026
⚠️ Active exploitation confirmed. No patch confirmed yet.
generic
https://crbug.com/1252918
generic🔴 Active Exploitation

Chrome Releases: Stable Channel Update for Desktop

https://chromereleases.googleblog.com/2021/09/stable-channel-update-for-desktop_30.html
generic

Packet Storm

http://packetstormsecurity.com/files/172847/Chrome-V8-Logic-Bug-Use-After-Free.html
generic

[SECURITY] [DSA 5046-1] chromium security update

https://www.debian.org/security/2022/dsa-5046
generic

[SECURITY] Fedora 33 Update: chromium-94.0.4606.81-1.fc33 - package-announce - Fedora mailing-lists

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RNARCF5HEZK7GJXZRN5TQ45AQDCRM2WO/
generic

[SECURITY] Fedora 35 Update: chromium-94.0.4606.81-1.fc35 - package-announce - Fedora mailing-lists

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FRFXUDH46PFVE75VQVWY6PYY5DK3S2XT/
generic

[SECURITY] Fedora 34 Update: chromium-94.0.4606.81-1.fc34 - package-announce - Fedora mailing-lists

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/D63JZ3ROXCUHP4CFWDHCPZNTGET7T34R/

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 60× in last 7d / 339× 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 676 total refreshes for this CVE.

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

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Frequently asked(6)

What is CVE-2021-37975?
CVE-2021-37975 is a critical vulnerability published on October 8, 2021. Use after free in V8 in Google Chrome prior to 94.0.4606.71 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.
When was CVE-2021-37975 disclosed?
CVE-2021-37975 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-2021-37975 actively exploited?
Yes. CISA added CVE-2021-37975 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-2021-37975?
CVE-2021-37975 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-2021-37975?
CVE-2021-37975 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-2021-37975?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-37975, 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.

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