CVE-2021-30596Network attack vector

Omnibox spoofing via incorrect navigation UI

Published Aug 26, 2021 · Updated Aug 3, 2024

Incorrect security UI in Google Chrome on Android before 92.0.4515.131 allows remote attackers to spoof the Omnibox via crafted HTML. Google identifies the locus only as Navigation and has not published the incorrect state transition or rendering operation behind the spoof. Exploitation requires a user to open attacker-controlled HTML in the Android browser, after which the displayed URL can misrepresent the page origin.

CVSS severity4.3
Medium
EPSS probability1.72%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect security UI in Google Chrome on Android before 92.0.4515.131 allows remote attackers to spoof the Omnibox via crafted HTML. Google identifies the locus only as Navigation and has not published the incorrect state transition or rendering operation behind the spoof. Exploitation requires a user to open attacker-controlled HTML in the Android browser, after which the displayed URL can misrepresent the page origin.

The record

CVE
CVE-2021-30596
Published
Aug 26, 2021
Updated
Aug 3, 2024
Vendor
Google Cloud
Product
Google Chrome
Classifications
CWE-346, T1036
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 <92.0.4515.131

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Google Cloud · Google Chromeversion=unspecified <92.0.4515.131

Published CVSS scores

4.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
4.3NIST NVDAV:N/AC:M/Au:N/C:N/I:P/A:N

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

CWE-346Origin Validation Error
T1036Masquerading

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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