CVE-2021-39723Network attack vector

Remote code execution through undisclosed modem flaw

Published Mar 16, 2022 · Updated Aug 4, 2024

Remote code execution in the modem of Google Pixel devices allows remote attackers to execute code via unspecified vectors. Google has not published the vulnerable modem function or the operation it performs incorrectly on untrusted input. Authentication and network preconditions are undisclosed; successful exploitation executes code in the modem context.

CVSS severity9.8
Critical
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

Remote code execution in the modem of Google Pixel devices allows remote attackers to execute code via unspecified vectors. Google has not published the vulnerable modem function or the operation it performs incorrectly on untrusted input. Authentication and network preconditions are undisclosed; successful exploitation executes code in the modem context.

The record

CVE
CVE-2021-39723
Published
Mar 16, 2022
Updated
Aug 4, 2024
Vendor
Google
Product
Google Pixel
Classifications
Unavailable
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 16, 2022CVE 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=Android kernel

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Google · Google Pixelversion=Android kernel

Published CVSS scores

9.8NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
10.0NVDAV:N/AC:L/Au:N/C:C/I:C/A:C

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

No sourced classifications are available.

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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