CVE-2026-7834
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 security vulnerability has been detected in EFM ipTIME NAS1dual 1.5.24. This issue affects the function get_csrf_whites of the file /cgi/advanced/misc_main.cgi. Such manipulation leads to stack-based buffer overflow. The attack can be launched remotely. The exploit has been disclosed publicly and may be used. 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 · moderate confidenceStack-based buffer overflow vulnerability in the get_csrf_whites function of /cgi/advanced/misc_main.cgi on EFM ipTIME NAS1dual firmware version 1.5.24. The overflow occurs when processing input in the CSRF whitelist function, potentially allowing remote attackers to overwrite stack memory and execute arbitrary code. The vulnerability is remotely exploitable with network access to the web interface.
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
- 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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Confirm device modelAccess the NAS web interface or check the device label/metadata to verify the model is EFM ipTIME NAS1dualAffected if Device model is EFM ipTIME NAS1dual
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Check firmware versionNavigate to the NAS admin panel (typically System Settings > Firmware or similar) or check via SSH/telnet if enabled to retrieve the installed firmware versionAffected if Firmware version is 1.5.24 or if the version cannot be determined but the device is this model
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Verify web interface accessibilityConfirm the NAS web interface (port 80/443) is reachable from the network - test with a browser or network scan (nmap) targeting the device IPAffected if The web management interface is network-accessible (not isolated behind firewall/VPN)
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Identify affected CGI endpointAttempt to access /cgi/advanced/misc_main.cgi on the NAS (e.g., http://<device-ip>/cgi/advanced/misc_main.cgi) to confirm the endpoint exists and respondsAffected if The CGI script /cgi/advanced/misc_main.cgi responds to requests
If the device is an EFM ipTIME NAS1dual running firmware version 1.5.24 and its web interface is network-accessible, the environment is affected by this 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 dataSince the vendor did not respond to disclosure, implement network segmentation to restrict access to the NAS management interface, consider disabling the affected CGI endpoint if possible through configuration, and monitor for firmware updates from ipTIME. If immediate mitigation is critical, restrict access to the web interface to trusted IP addresses only.
- Consultation8.0 h
- Implementation24.0 h
- Testing12.0 h
- Review / QA6.0 h
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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-2026-7834 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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