Page generated: 09 Nov 2026, 13:07 UTC
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CVE-2021-37975

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 8.8 (HIGH) KEV: KNOWN CATALOG

Attention and evidence

HYPE SCORE
0.0/10
REALITY · THREAT PRIORITY
8.5/10
General review priority; not probability

Evidence confidence: Exploitation recorded

Why this priority?
  • Recorded exploitation baseline: +7.00
  • Technical severity: CVSS 8.8: +1.32
  • Fresh EPSS: 34.89%: +0.17

General review priority, not probability, victim count or asset-specific risk. A range covers missing CVSS/EPSS inputs within the current evidence state.

Sources: 11 documents and public datasets.

Hype components

Headline sample (25%)
0/100
Press, 30 days (60%)
0/100
Grounded branding (15%)
0/100
HYPE TOTAL0/100

Sources and documents

Qualys
Press · 22 Feb 2022, 08:00 · Managing CISA Known Exploited Vulnerabilities with Qualys VMDR - Qualys
BleepingComputer
Press · 13 Dec 2021, 08:00 · Google pushes emergency Chrome update to fix zero-day used in attacks - BleepingComputer
The Hacker News
Press · 29 Oct 2021, 07:00 · Google Releases Urgent Chrome Update to Patch 2 Actively Exploited 0-Day Bugs - The Hacker News
BleepingComputer
Press · 28 Oct 2021, 07:00 · Emergency Google Chrome update fixes zero-days used in attacks - BleepingComputer
The Record from Recorded Future News
Press · 28 Oct 2021, 07:00 · Google fixes 15th and 16th Chrome zero-day this year - The Record from Recorded Future News
See all 11 source documents
The GitHub Blog
Press · 19 Oct 2021, 07:00 · Chrome in-the-wild bug analysis: CVE-2021-37975 - The GitHub Blog
BleepingComputer
Press · 12 Oct 2021, 07:00 · Microsoft October 2021 Patch Tuesday fixes 4 zero-days, 71 flaws - BleepingComputer
Check Point Research
Press · 04 Oct 2021, 07:00 · 4th October – Threat Intelligence Report - Check Point Research
Kaspersky
Press · 04 Oct 2021, 07:00 · Six tips to protect against phishing attacks - Kaspersky
Tech Times
Press · 03 Oct 2021, 07:00 · Google Chrome Users Urged To Update After Two New Vulnerabilities In The Browser Were Discovered - Tech Times
Kaspersky
Press · 02 Oct 2021, 07:00 · Three vulnerabilities in Google Chrome - Kaspersky

Score evolution

● Hype   ● Reality

Earlier evidence-support scores are retained in history; this chart shows only the current priority definition.

First record: hype 0.0 · reality 8.5 (2026-11-02 15:12). The curve appears once the score changes.

Public exploit evidence

0

Public exploit entries / repo candidates

Evidence context and dated references

Reality is general threat/review priority, combining observed exploitation, CVSS severity and fresh EPSS. Evidence confidence is separate. This is not calibrated risk, a victim count or an asset-specific assessment. A range reflects missing numeric inputs.

Evidence in context

Confidence in exploitation evidence
Exploitation recorded
Priority basis
Recorded exploitation; CVSS 8.8; EPSS 34.9%
Attention, last 30 days
0 distinct story titles; 0 press documents; 0 publisher domains.
Technical potential
network access, no prior privileges, user interaction.
Observed activity
Exploitation recorded in CISA KEV.
Known scale
Not quantified.
Evidence confidence basis
Trusted exploitation confirmation

Score evaluated: 2026-11-05 13:58:28.999775+00:00 · EPSS snapshot: 2026-11-05T12:03:04Z

Source event timeline
First press mention
02 Oct 2021, 07:00
Published
08 Oct 2021, 00:00
Added to the CISA KEV catalog
03 Nov 2021, 00:00
Latest press mention
22 Feb 2022, 08:00
Score calculated
05 Nov 2026, 13:58