CVE-2012-4876
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 · uneditedStack-based buffer overflow in the UltraMJCam ActiveX Control in TRENDnet SecurView TV-IP121WN Wireless Internet Camera allows remote attackers to execute arbitrary code via a long string to the OpenFileDlg method.
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 UltraMJCam ActiveX Control component of TRENDnet SecurView TV-IP121WN Wireless Internet Camera. The flaw resides in the OpenFileDlg method which fails to properly validate input length before copying data to a stack buffer, allowing remote attackers to overwrite return addresses and execute arbitrary code.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data= 1.1.52.18= tv-ip121wnCVSS 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
- Authentication
- None
- Confidentiality
- Complete
- Integrity
- Complete
- Availability
- Complete
AV:N/AC:L/Au:N/C:C/I:C/A:C
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 if UltraMJCam ActiveX control is installedCheck Windows registry for the ActiveX control CLSID under HKEY_CLASSES_ROOT\CLSID. The control is typically registered with CLSID {98C52441-4529-49C8-9D1E-BF62E48CE052} or search for 'UltraMJCam' in the registry.Affected if The ActiveX control is present and registered on the system
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Verify the ActiveX control versionCheck the version of UltraMJCam.ocx or the DLL containing the control in the system32 or download cache directories. Right-click the file, select Properties, and check the Version tab.Affected if The installed version is exactly 1.1.52.18
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Identify affected Trendnet camera on the networkScan the network for Trendnet TV-IP121WN devices by checking device banners, MAC OUI (TRENDnet uses 00:14:D1 or similar), or access the camera web interface and check the firmware version in the status page.Affected if A TV-IP121WN camera with matching vulnerable firmware is found on the network
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Confirm ActiveX is enabled in Internet ExplorerOpen Internet Explorer, go to Tools > Internet Options > Security > Custom Level, and check the settings under ActiveX controls and plugins. Also check add-ons in Manage Add-ons.Affected if The UltraMJCam ActiveX control is allowed to run in Internet zones
A system is affected if it has UltraMJCam ActiveX control version 1.1.52.18 installed, particularly in an environment where Internet Explorer can load the control and the TV-IP121WN camera 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 dataDisable the vulnerable UltraMJCam ActiveX control in Internet Explorer settings, apply network segmentation to isolate affected camera devices from untrusted networks, and contact TRENDnet for firmware updates addressing this vulnerability.
- Consultation6.0 h
- Implementation12.0 h
- Testing6.0 h
- Review / QA4.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2012-4876 — 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-2012-4876 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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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
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