CVE-2021-37964

Wi-Fi impersonation via omitted EAP certificate constraints

Published Oct 8, 2021 · Updated Aug 4, 2024

Wi-Fi impersonation in Google Chrome before 94.0.4606.54 on ChromeOS allows physically proximate attackers to spoof an EAP access point. ChromeOS Networking failed to carry ONC domain-suffix and subject-alternative-name constraints through shill to wpa_supplicant when validating EAP server certificates. A victim must import the crafted ONC configuration and connect within range of the rogue wireless access point; the documented impact is connection integrity.

CVSS severity3.3
Low
EPSS probability0.52%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Wi-Fi impersonation in Google Chrome before 94.0.4606.54 on ChromeOS allows physically proximate attackers to spoof an EAP access point. ChromeOS Networking failed to carry ONC domain-suffix and subject-alternative-name constraints through shill to wpa_supplicant when validating EAP server certificates. A victim must import the crafted ONC configuration and connect within range of the rogue wireless access point; the documented impact is connection integrity.

The record

CVE
CVE-2021-37964
Published
Oct 8, 2021
Updated
Aug 4, 2024
Vendor
Google Cloud
Product
Google Chrome
Classifications
T1557
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 8, 2021CVE 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 <94.0.4606.54

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Google Cloud · Google Chromeversion=unspecified <94.0.4606.54

Published CVSS scores

3.3NIST NVDCVSS:3.1/AV:L/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)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1557Adversary-in-the-Middle

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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