CVE-2020-6401Network attack vector

Domain spoofing via unvalidated IDN homographs

Published Feb 11, 2020 · Updated Aug 4, 2024

Improper input validation in Google Chrome before 80.0.3987.87 allows remote attackers to spoof domains through crafted IDN homographs. The Omnibox displays a crafted internationalized domain name as a visually confusable homograph without sufficient validation. A user must navigate to or otherwise view the crafted domain; the address-bar deception can misrepresent the site's identity but does not itself disclose data or execute code.

CVSS severity6.5
Medium
EPSS probability1.94%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper input validation in Google Chrome before 80.0.3987.87 allows remote attackers to spoof domains through crafted IDN homographs. The Omnibox displays a crafted internationalized domain name as a visually confusable homograph without sufficient validation. A user must navigate to or otherwise view the crafted domain; the address-bar deception can misrepresent the site's identity but does not itself disclose data or execute code.

The record

CVE
CVE-2020-6401
Published
Feb 11, 2020
Updated
Aug 4, 2024
Vendor
Google Cloud
Product
Google Chrome
Classifications
CWE-20
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 11, 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 <80.0.3987.87

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Google Cloud · Google Chromeversion=unspecified <80.0.3987.87

Published CVSS scores

6.5NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
4.3NVDAV: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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-20Improper Input Validation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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