CVE-2026-38835
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 · uneditedTenda W30E V2.0 V16.01.0.21 was found to contain a command injection vulnerability in the formSetUSBPartitionUmount function via the usbPartitionName parameter. This vulnerability allows attackers to execute arbitrary commands via a crafted request.
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 confidenceThe Tenda W30E V2.0 router firmware V16.01.0.21 contains a command injection vulnerability in the formSetUSBPartitionUmount function where the usbPartitionName parameter is not properly sanitized before being used in a system call, allowing authenticated attackers to inject and execute arbitrary operating system commands.
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= 16.01.0.21CVSS 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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Check router firmware versionLog into the Tenda W30E web management interface and navigate to System Status or Firmware Upgrade page to view the current firmware version. Alternatively, access the router's admin panel or check via telnet/SSH if enabled.Affected if Firmware version is exactly 16.01.0.21
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Verify USB functionality statusAccess the router web interface and check if USB support is enabled under USB Settings or Storage settings. Look for options like USB Storage, USB Partition, or USB Sharing.Affected if USB storage/partition functionality is enabled or configured
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Confirm administrative access exposureDetermine if the router web management interface (typically on port 80 or 443) is accessible from untrusted networks. Check router firewall settings and WAN interface exposure.Affected if Administrative interface is reachable from outside trusted networks
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Identify USB partitions configuredIn the router web interface under USB/Storage settings, check if any USB partitions are defined or mounted. The vulnerable function is formSetUSBPartitionUmount.Affected if USB partitions are defined or the unmount feature is available in the interface
If the firmware is exactly version 16.01.0.21 and USB partition functionality is enabled, the device is affected by this command injection vulnerability.
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 firmware patch when available; until then, disable USB functionality if unused, restrict administrative access to trusted IPs only via firewall rules, and monitor for unauthorized access attempts.
- Consultation3.0 h
- Implementation2.0 h
- Testing2.0 h
- Review / QA1.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-38835 — 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-2026-38835 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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- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
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