Page generated: 09 Nov 2026, 12:51 UTC
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CVE-2021-38003

Inappropriate implementation in V8 in Google Chrome prior to 95.0.4638.69 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
2.0/10
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: 38.57%: +0.19

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

Sources: 10 documents and public datasets.

Hype components

Headline sample (25%)
70/100
Press, 30 days (60%)
5/100
Grounded branding (15%)
0/100
HYPE TOTAL20/100

Sources and documents

Recorded Future
Press · 13 Oct 2026, 07:00 · 2026年9月 CVEの概況​​ - Recorded Future
The Hacker News
Press · 05 Dec 2025, 08:00 · Intellexa Leaks Reveal Zero-Days and Ads-Based Vector for Predator Spyware Delivery - The Hacker News
SecNews.gr
Press · 04 Dec 2025, 08:00 · Intellexa: Predator network survives despite sanctions – New data - SecNews.gr
The Hacker News
Press · 13 Feb 2023, 08:00 · Hackers Create Malicious Dota 2 Game Modes to Secretly Access Players' Systems - The Hacker News
www.gendigital.com
Press · 08 Feb 2023, 08:00 · Dota 2 under attack: How a V8 bug was exploited in the game - www.gendigital.com
See all 10 source documents
The Hacker News
Press · 20 May 2022, 07:00 · Cytrox's Predator Spyware Targeted Android Users with Zero-Day Exploits - The Hacker News
blog.google
Press · 19 May 2022, 07:00 · Protecting Android users from 0-Day attacks - blog.google
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
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
BleepingComputer
Press · 28 Oct 2021, 07:00 · Emergency Google Chrome update fixes zero-days used in attacks - BleepingComputer

Score evolution

● Hype   ● Reality

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

First record: hype 2.0 · reality 8.5 (2026-11-02 15:12). The curve appears once the score changes.

Public exploit evidence

1

Public exploit entries / repo candidates

See 1 repos with metrics
RepositoryStarsForksLanguageUpdated
jamezx32/CVE-2021-3800300JavaScript14 Oct 2026, 10:47
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 38.6%
Attention, last 30 days
1 distinct story titles; 1 press documents; 1 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
28 Oct 2021, 07:00
Added to the CISA KEV catalog
03 Nov 2021, 00:00
Published
23 Nov 2021, 21:30
Latest press mention
13 Oct 2026, 07:00
Score calculated
05 Nov 2026, 13:58
PoCs on GitHub
1 repositories