CVE-2021-21741
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedThere is a command execution vulnerability in a ZTE conference management system. As some services are enabled by default, the attacker could exploit this vulnerability to execute arbitrary commands by sending specific serialization command.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · moderate confidenceCommand injection vulnerability in ZTE conference management system allows remote attackers to execute arbitrary OS commands via specially crafted serialization commands. The vulnerability is exploitable without authentication, and some default-enabled services expand the attack surface.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data= 1.2.16.01u01.01= 1.2.19.01u01.01= 1.2.20.01u01.01= 1.2.21.01.04CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Identify the device modelAccess the device admin interface or check the system information page to confirm the device is a ZTE Zxv10 M910 conference management systemAffected if The device model is ZTE Zxv10 M910
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Check the firmware versionNavigate to the system settings or about page in the management interface, or use the command line interface (if accessible) to retrieve the firmware version stringAffected if The installed firmware version is exactly 1.2.16.01u01.01, 1.2.19.01u01.01, 1.2.20.01u01.01, or 1.2.21.01.04
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Determine if the serialization command feature is enabledInspect the service configuration or examine which management interfaces are accessible on the device. Look for settings related to API endpoints or serialization processing that handle external commandsAffected if The serialization command processing feature is active and accessible (no authentication required per the CVE description)
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Check network exposure of management interfaceReview firewall rules, port exposures, or network configuration to determine if the device management interface is reachable from untrusted networksAffected if The management interface is exposed to the internet or untrusted LAN segments without network segmentation
The environment is affected if the device is a ZTE Zxv10 M910 running one of the four specific firmware versions listed and the conference management serialization feature is accessible (which may be default-enabled).
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor dataApply vendor patch when available; if no patch exists, disable default-enabled services, implement network segmentation, and restrict access to the management interface.
- Consultation4.0 h
- Implementation6.0 h
- Testing4.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $4,544.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2021-21741 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2021-21741 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
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