CVE-2026-4862
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 UTT HiPER 1250GW up to 3.2.7-210907-180535. This issue affects the function strcpy of the file /goform/formConfigDnsFilterGlobal of the component Parameter Handler. Such manipulation of the argument GroupName leads to buffer overflow. The attack can be launched remotely. The exploit has been disclosed publicly and may be used.
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 confidenceBuffer overflow vulnerability in the strcpy function within the Parameter Handler component of UTT HiPER 1250GW firmware (up to 3.2.7-210907-180535). The GroupName parameter passed to /goform/formConfigDnsFilterGlobal is not properly validated before being copied to a fixed-size buffer, allowing remote attackers to overflow the buffer and 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 model is UTT HiPER 1250GWAccess the device web management interface and check the system status or device information page, or log into the device via SSH/Telnet and run 'cat /proc/cpuinfo' or check the model designation in the administrative interface.Affected if The device is not a UTT HiPER 1250GW model.
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Check installed firmware versionIn the web interface, navigate to System > Firmware Upgrade or System Status to view the current firmware version. Compare against 3.2.7-210907-180535 - versions at or below this are affected.Affected if Firmware version is 3.2.7-210907-180535 or lower.
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Verify web management interface is accessibleAttempt to access the device IP address on ports 80 or 443 via HTTP/HTTPS from the network. The vulnerability is exploitable only if the web interface is reachable.Affected if The web management interface is exposed and reachable on the network.
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Check if DNS Filter feature is accessibleLog into the web interface and navigate to the DNS Filter or Content Filtering section (usually under Security or Firewall settings). Determine if formConfigDnsFilterGlobal is a functional endpoint.Affected if The DNS Filter configuration interface is available and the GroupName parameter can be submitted.
The device is affected if it is a UTT HiPER 1250GW running firmware version 3.2.7-210907-180535 or lower, with the web management interface accessible and the DNS Filter feature available for configuration.
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; in the interim, restrict network access to the device's web management interface and implement input length restrictions on the GroupName parameter via upstream network filtering.
- Consultation4.0 h
- Implementation6.0 h
- Testing3.0 h
- Review / QA2.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2026-4862 — 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-2026-4862 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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