CVE-2021-37976

CRITICALNVD 6.59.0▲
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 6.5 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
9.0EG
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS PROB: 20%CVSS: 6.5Exploit: cisa kev · ssvc active · epss top5pctExposed: 0

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

Inappropriate implementation in Memory in Google Chrome prior to 94.0.4606.71 allowed a remote attacker to obtain potentially sensitive information from process memory via a crafted HTML page.

CVSS v3
6.5
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 PROB
20%
EPSS %ILE
97%
KEV
⚠ Exploited

Published

October 8, 2021

Last Modified

October 24, 2025

Advisory Details (6)

Auto-updated Jun 12, 2026
⚠️ Active exploitation confirmed. No patch confirmed yet.
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/
generic
https://crbug.com/1251787
generic🔴 Active Exploitation

Chrome Releases: Stable Channel Update for Desktop

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

Affected Packages

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
chromium90.0.4430.212-1, 93.0.4577.82-197.0.4692.71-0.1~deb11u1—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
chromium—97.0.4692.71-0.1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
chromium—97.0.4692.71-0.1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
chromium—97.0.4692.71-0.1—

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 97× in last 7d / 421× 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 1,362 total refreshes for this CVE.

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

Frequently asked(6)

What is CVE-2021-37976?
CVE-2021-37976 is a critical vulnerability published on October 8, 2021. Inappropriate implementation in Memory in Google Chrome prior to 94.0.4606.71 allowed a remote attacker to obtain potentially sensitive information from process memory via a crafted HTML page.
When was CVE-2021-37976 disclosed?
CVE-2021-37976 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-2021-37976 actively exploited?
Yes. CISA added CVE-2021-37976 to the Known Exploited Vulnerabilities catalog on November 3, 2021, affecting Google Chromium. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2021-37976?
CVE-2021-37976 has a CVSS v3 base score of 6.5 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0.
Which products are affected by CVE-2021-37976?
CVE-2021-37976 affects Google Chromium. 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-2021-37976?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-37976, 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-2021-37976

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