CVE-2026-8234
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 A8004T 14.18.2. This vulnerability affects the function formWifiBasicSet of the file /goform/WifiBasicSet. The manipulation of the argument security_5g leads to stack-based buffer overflow. The attack may be initiated 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 in the formWifiBasicSet function of EFM ipTIME A8004T router firmware 14.18.2. The security_5g parameter in the /goform/WifiBasicSet web interface is not properly validated before being copied to a fixed-size stack buffer, allowing remote attackers to potentially execute arbitrary code or cause denial of service.
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
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:L/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 router's web interface or CLI and identify the exact model number - it must be EFM ipTIME A8004TAffected if Device is not an A8004T model
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Check firmware versionNavigate to the router's admin panel (typically at 192.168.0.1) and look for the firmware version in System or Administration settings, or use 'grep' on the firmware file if you have access to itAffected if Firmware version is 14.18.2 (the affected version)
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Verify 5G Wi-Fi is enabledIn the router's wireless settings, check whether the 5GHz wireless network is turned on - the vulnerability exists in the security_5g parameterAffected if 5GHz Wi-Fi is enabled and configured
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Check if web interface is accessibleAttempt to access the /goform/WifiBasicSet endpoint or verify the web management interface is reachable on LAN or WANAffected if Web interface is accessible (especially from WAN)
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Inspect security_5g configurationIf you can access the router's configuration backup or live settings, look for the security_5g parameter in the wireless security settings for the 5GHz bandAffected if The security_5g parameter contains unusually long input (potential exploitation indicator)
The environment is affected if the device is an A8004T router running firmware 14.18.2 with the 5GHz wireless feature enabled and the web management interface 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 dataSince the vendor did not respond, consider disabling the affected 5G Wi-Fi functionality if possible, or investigate community-developed firmware alternatives (such as OpenWrt) that may address this vulnerability. Implement network segmentation to limit exposure of the device management interface to untrusted networks.
- Consultation4.0 h
- Implementation8.0 h
- Testing4.0 h
- Review / QA2.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2026-8234 — 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-2026-8234 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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