CVE-2021-45990
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 routers G1 and G3 v15.11.0.17(9502)_CN were discovered to contain a command injection vulnerability in the function uploadPicture. This vulnerability allows attackers to execute arbitrary commands via the pic_name parameter.
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 · high confidenceTenda G1 and G3 routers running firmware v15.11.0.17(9502)_CN contain a command injection vulnerability in the uploadPicture function. The pic_name parameter is not properly sanitized, allowing attackers to inject and execute arbitrary OS commands on the router through the web interface.
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= 15.11.0.17\(9502\)_cn= 15.11.0.17\(9502\)_cnCVSS 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 router modelLog into the router web interface and check the device information page, or check the device label/marking to confirm it is a Tenda G1 or G3 router.Affected if The device is not a Tenda G1 or G3 router.
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Check firmware versionIn the router web interface, navigate to System Settings or Device Info to view the firmware version. Compare the displayed version to 15.11.0.17(9502)_CN.Affected if The firmware version is exactly 15.11.0.17(9502)_CN.
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Verify web management interface statusCheck if the router web interface is accessible from the network. For WAN exposure, check the router firewall or port forwarding settings to see if HTTP/HTTPS ports are forwarded or if remote management is enabled.Affected if The router web interface is accessible and the uploadPicture function exists.
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Confirm uploadPicture function presenceThe vulnerability exists in the uploadPicture function used for uploading images via the web interface. Check if the router firmware includes image upload or picture upload functionality in its web management features.Affected if The firmware includes the uploadPicture function and the pic_name parameter is processed without sanitization.
The environment is affected if the device is a Tenda G1 or G3 router running firmware version 15.11.0.17(9502)_CN and the web interface with upload functionality is accessible.
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 update when available; until then, disable remote web management via WAN, restrict admin interface access to trusted IPs only, and monitor for unauthorized access.
- Consultation4.0 h
- Implementation8.0 h
- Testing6.0 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 $5,600.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2021-45990 — 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-2021-45990 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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