CVE-2021-21750

Privilege escalation via timed-task authorization failure

Published Dec 27, 2021 · Updated Aug 3, 2024

Privilege escalation in ZTE ZXIN10 CMS ZXOMS-BIGDATA-IOPSWEBV3.01.01.04 and earlier allows local users to gain unauthorized access. The timed-task modification path does not enforce the privilege boundary for ordinary accounts, permitting operations reserved for higher-privileged users. Exploitation requires an existing ordinary user account and yields unauthorized access; the vendor has not disclosed the exact resources reached.

CVSS severity7.8
High
EPSS probability0.32%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Privilege escalation in ZTE ZXIN10 CMS ZXOMS-BIGDATA-IOPSWEBV3.01.01.04 and earlier allows local users to gain unauthorized access. The timed-task modification path does not enforce the privilege boundary for ordinary accounts, permitting operations reserved for higher-privileged users. Exploitation requires an existing ordinary user account and yields unauthorized access; the vendor has not disclosed the exact resources reached.

The record

CVE
CVE-2021-21750
Published
Dec 27, 2021
Updated
Aug 3, 2024
Vendor
ZTE Corporation
Product
ZXIN10 CMS
Classifications
CWE-269, CAPEC-58, CAPEC-122, CAPEC-233, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 27, 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=All versions up to ZXOMS-BIGDATA-IOPSWEBV3.01.01.04

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

ZTE Corporation · ZXIN10 CMSversion=All versions up to ZXOMS-BIGDATA-IOPSWEBV3.01.01.04

Published CVSS scores

4.6NIST NVDAV:L/AC:L/Au:N/C:P/I:P/A:P
7.8ZTE CorporationCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-269Improper Privilege Management
CAPEC-58Restful Privilege Elevation
CAPEC-122Privilege Abuse
CAPEC-233Privilege Escalation
T1068Exploitation for Privilege Escalation

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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