CVE-2021-4318Network attack vector

Blink object corruption via crafted HTML

Published Jul 28, 2023 · Updated Feb 13, 2025

Object corruption in Blink in Google Chrome before 94.0.4606.54 allows remote attackers to corrupt memory via crafted HTML. Google identifies the affected locus only as Blink and has not published the corrupting operation or object type in the public advisory. Exploitation requires a user to load attacker-controlled HTML; the published record does not specify the resulting action beyond exploitation of the corruption.

CVSS severity8.8
High
EPSS probability0.68%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Object corruption in Blink in Google Chrome before 94.0.4606.54 allows remote attackers to corrupt memory via crafted HTML. Google identifies the affected locus only as Blink and has not published the corrupting operation or object type in the public advisory. Exploitation requires a user to load attacker-controlled HTML; the published record does not specify the resulting action beyond exploitation of the corruption.

The record

CVE
CVE-2021-4318
Published
Jul 28, 2023
Updated
Feb 13, 2025
Vendor
Google Cloud
Product
Google Chrome
Classifications
T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 28, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 13, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=94.0.4606.54 <94.0.4606.54

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Google Cloud · Google Chromeversion=94.0.4606.54 <94.0.4606.54

Published CVSS scores

8.8UbuntuCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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