CVE-2021-21732Network attack vector

Sensitive file disclosure via improper proc permissions

Published May 19, 2021 · Updated Aug 3, 2024

Improper access control in ZTE Axon 11 5G allows attackers to read sensitive proc files through a third-party application. The affected Android 10 build, ZTE/CN_P725A12/P725A12:10/QKQ1.200816.002/20201116.175317:user/release-keys, assigns overly broad permissions to unspecified files under /proc, exposing their contents to ordinary installed applications. Exploitation requires execution of a third-party application on the handset and is limited by the published record to sensitive-information disclosure.

CVSS severity7.5
High
EPSS probability1.00%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper access control in ZTE Axon 11 5G allows attackers to read sensitive proc files through a third-party application. The affected Android 10 build, ZTE/CN_P725A12/P725A12:10/QKQ1.200816.002/20201116.175317:user/release-keys, assigns overly broad permissions to unspecified files under /proc, exposing their contents to ordinary installed applications. Exploitation requires execution of a third-party application on the handset and is limited by the published record to sensitive-information disclosure.

The record

CVE
CVE-2021-21732
Published
May 19, 2021
Updated
Aug 3, 2024
Vendor
ZTE Corporation
Product
ZTE Axon 11 5G
Classifications
Unavailable
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 19, 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=<ZTE/CN_P725A12/P725A12:10/QKQ1.200816.002/20201116.175317:user/release-keys>

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

ZTE Corporation · ZTE Axon 11 5Gversion=<ZTE/CN_P725A12/P725A12:10/QKQ1.200816.002/20201116.175317:user/release-keys>

Published CVSS scores

5.0NIST NVDAV:N/AC:L/Au:N/C:P/I:N/A:N
7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/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

No sourced classifications are available.

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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