CVE-2026-9631
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 vulnerability was detected in UTT HiPER 1250GW up to 3.2.7-210907-180535. Affected by this vulnerability is the function strcpy of the file /goform/formConfigFastDirectionW of the component Web Management Interface. Performing a manipulation of the argument Profile results in stack-based buffer overflow. It is possible to initiate the attack remotely. The exploit is now public 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 confidenceStack-based buffer overflow in UTT HiPER 1250GW router's web management interface. The strcpy function in /goform/formConfigFastDirectionW handler copies the unsanitized 'Profile' parameter directly to a fixed-size stack buffer without bounds checking, allowing remote attackers to overflow the stack and potentially achieve code execution.
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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Identify the device modelCheck the device label, web interface footer, or DHCP vendor identifier to confirm the model is UTT HiPER 1250GWAffected if The device is not a UTT HiPER 1250GW, then this specific CVE does not apply
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Check if web management interface is accessibleAttempt to access the router's web interface on common ports 80 or 443 (e.g., http://<router-ip>/)Affected if The web interface is accessible from an attacker-controlled network segment, indicating potential exposure
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Identify the firmware versionLog into the web interface and look for a System Status, Firmware Version, or About page; alternatively, check the HTTP headers or the footer of any web page for version informationAffected if The firmware version cannot be determined or is older than any available patched version (if known)
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Verify the vulnerable endpoint existsSend an HTTP POST request to /goform/formConfigFastDirectionW with a test 'Profile' parameter (e.g., Profile=test) and observe the responseAffected if The endpoint responds (even with an error), indicating the vulnerable function is present
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Check if remote web management is enabledLook in the router settings under Remote Management, Web Access, or Administration settings for an option to enable/disable remote HTTP/HTTPS accessAffected if Remote web management is enabled and the management interface is reachable from untrusted networks
A user is affected if they own a UTT HiPER 1250GW router with an accessible web management interface where the /goform/formConfigFastDirectionW endpoint handles the Profile parameter without bounds checking.
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 if available. Until then, restrict access to the web management interface to trusted internal networks only, or disable the affected form handler if possible via configuration.
- Consultation2.0 h
- Implementation3.0 h
- Testing2.0 h
- Review / QA1.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2026-9631 — 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-2026-9631 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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