CVE-2021-21722

Sensitive-data disclosure via incompletely verified logs

Published Jan 14, 2021 · Updated Aug 3, 2024

Information disclosure in ZTE ZXV10 B860A V2.1-T_V0032.1.1.04_jiangsuTelecom allows local users to read sensitive user data. The firmware writes sensitive user information to a log and does not fully verify or protect that log before privileged local access. High privileges and local access are required; the reported consequence is confidentiality exposure for follow-on reconnaissance, not data modification or service interruption.

CVSS severity4.4
Medium
EPSS probability0.39%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in ZTE ZXV10 B860A V2.1-T_V0032.1.1.04_jiangsuTelecom allows local users to read sensitive user data. The firmware writes sensitive user information to a log and does not fully verify or protect that log before privileged local access. High privileges and local access are required; the reported consequence is confidentiality exposure for follow-on reconnaissance, not data modification or service interruption.

The record

CVE
CVE-2021-21722
Published
Jan 14, 2021
Updated
Aug 3, 2024
Vendor
ZTE Corporation
Product
ZXV10 B860A
Classifications
CWE-532, T1005
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Jan 14, 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=V2.1-T_V0032.1.1.04_jiangsuTelecom

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

ZTE Corporation · ZXV10 B860Aversion=V2.1-T_V0032.1.1.04_jiangsuTelecom

Published CVSS scores

2.1NIST NVDAV:L/AC:L/Au:N/C:P/I:N/A:N
4.4ZTE CorporationCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
4.4NIST NVDCVSS:3.1/AV:L/AC:L/PR:H/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.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-532Insertion of Sensitive Information into Log File
T1005Data from Local System

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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