CVE-2026-7833
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 · uneditedA weakness has been identified in EFM ipTIME C200 up to 1.092. This vulnerability affects the function sub_408F90 of the file /cgi/iux_set.cgi of the component ApplyRestore Endpoint. This manipulation of the argument RestoreFile causes command injection. The attack can be initiated remotely. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.
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 confidenceCommand injection vulnerability in EFM ipTIME C200 routers (firmware up to 1.092) in the /cgi/iux_set.cgi ApplyRestore endpoint. The RestoreFile parameter passed to function sub_408F90 is not sanitized before being used in a system call, allowing remote attackers to execute arbitrary commands.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
CVSS 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
- High
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:H/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 router web interface or check the device label to confirm it is an EFM ipTIME C200 modelAffected if The device is an EFM ipTIME C200 router
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Check the firmware versionLog into the router admin panel and navigate to the status or firmware information page to view the installed firmware version, or use the command 'cat /proc/version' if SSH/telnet access is availableAffected if The firmware version is 1.092 or lower
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Verify the web interface is accessibleAttempt to access the router login page via HTTP/HTTPS on the default management port (typically 80 or 443)Affected if The router web interface is reachable on the network
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Confirm the vulnerable endpoint existsSend an HTTP request to /cgi/iux_set.cgi (e.g., curl http://<router_ip>/cgi/iux_set.cgi) and observe if the endpoint respondsAffected if The /cgi/iux_set.cgi endpoint is accessible and responds to requests
A user is affected if they are running an EFM ipTIME C200 router with firmware version 1.092 or lower and the router web interface (including the ApplyRestore endpoint) is accessible on the network.
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 input validation and sanitization to the RestoreFile parameter in the ApplyRestore endpoint; if no vendor patch exists, consider network segmentation to limit exposure to this device until a firmware update is available.
- Consultation6.0 h
- Implementation12.0 h
- Testing6.0 h
- Review / QA3.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-7833 — 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-2026-7833 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
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