CVE-2022-23139Network attack vector

Privilege escalation via misleading SFTP permission display

Published May 12, 2022 · Updated Aug 3, 2024

Incorrect authorization in ZTE ZXMP M721 5.10.030.006 allows remote authenticated users to gain higher operating permissions on key files via SFTP. The SFTP permission view reports folders as mode 666 even when effective permissions differ, obscuring permission changes on key files. A low-authority account with SFTP access can consequently obtain higher operating permissions on those files.

CVSS severity2.7
Low
EPSS probability0.77%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect authorization in ZTE ZXMP M721 5.10.030.006 allows remote authenticated users to gain higher operating permissions on key files via SFTP. The SFTP permission view reports folders as mode 666 even when effective permissions differ, obscuring permission changes on key files. A low-authority account with SFTP access can consequently obtain higher operating permissions on those files.

The record

CVE
CVE-2022-23139
Published
May 12, 2022
Updated
Aug 3, 2024
Vendor
ZTE Corporation
Product
ZXMP M721
Classifications
CWE-863, T1068
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 12, 2022CVE 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=V5.10.030.006

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

ZTE Corporation · ZXMP M721version=V5.10.030.006

Published CVSS scores

2.7ZTE CorporationCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:L
8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
6.5NIST NVDAV:N/AC:L/Au:S/C:P/I:P/A:P

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)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-863Incorrect Authorization
T1068Exploitation for Privilege Escalation

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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