CVE-2020-6491Network attack vector

Remote security UI spoofing via crafted domain

Published May 21, 2020 · Updated Aug 4, 2024

Insufficient data validation in site information in Google Chrome before 83.0.4103.61 allows remote attackers to spoof security UI via a crafted domain name. Site-information handling accepts attacker-controlled domain data without sufficient validation, causing Chrome to present misleading security indicators. Exploitation requires a victim to visit the crafted domain, and the documented impact is integrity loss of browser security presentation rather than data disclosure or service interruption.

CVSS severity6.5
Medium
EPSS probability1.46%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Insufficient data validation in site information in Google Chrome before 83.0.4103.61 allows remote attackers to spoof security UI via a crafted domain name. Site-information handling accepts attacker-controlled domain data without sufficient validation, causing Chrome to present misleading security indicators. Exploitation requires a victim to visit the crafted domain, and the documented impact is integrity loss of browser security presentation rather than data disclosure or service interruption.

The record

CVE
CVE-2020-6491
Published
May 21, 2020
Updated
Aug 4, 2024
Vendor
Google Cloud
Product
Google Chrome
Classifications
T1036
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 21, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 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 <83.0.4103.61

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Google Cloud · Google Chromeversion=unspecified <83.0.4103.61

Published CVSS scores

4.3NVDAV:N/AC:M/Au:N/C:N/I:P/A:N
6.5NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/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

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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