CVE-2021-30604Network attack vector

Heap corruption via ANGLE use-after-free

Published Aug 26, 2021 · Updated Aug 3, 2024

Use-after-free in ANGLE in Google Chrome before 92.0.4515.159 allows remote attackers to corrupt heap memory through crafted HTML. Google identifies ANGLE as the faulty component but does not disclose the freed object, code path, or lifetime error that produces the stale access. Exploitation requires a user to load attacker-controlled HTML, after which the stale access corrupts the browser process heap.

CVSS severityUnavailable
Unscored
EPSS probability2.52%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in ANGLE in Google Chrome before 92.0.4515.159 allows remote attackers to corrupt heap memory through crafted HTML. Google identifies ANGLE as the faulty component but does not disclose the freed object, code path, or lifetime error that produces the stale access. Exploitation requires a user to load attacker-controlled HTML, after which the stale access corrupts the browser process heap.

The record

CVE
CVE-2021-30604
Published
Aug 26, 2021
Updated
Aug 3, 2024
Vendor
Google Cloud
Product
Google Chrome
Classifications
T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 26, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record 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=unspecified <92.0.4515.159

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Google Cloud · Google Chromeversion=unspecified <92.0.4515.159

Published CVSS scores

No CVSS assessment is available in this record.

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.

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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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