CVE-2006-2086
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 · uneditedBuffer overflow in JuniperSetupDLL.dll, loaded from JuniperSetup.ocx by the Juniper SSL-VPN Client when accessing a Juniper NetScreen IVE device running IVE OS before 4.2r8.1, 5.0 before 5.0r6.1, 5.1 before 5.1r8, 5.2 before 5.2r4.1, or 5.3 before 5.3r2.1, allows remote attackers to execute arbitrary code via a long argument in the ProductName parameter.
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 confidenceA buffer overflow vulnerability exists in JuniperSetupDLL.dll (loaded by JuniperSetup.ocx) within the Juniper SSL-VPN Client. The vulnerability is triggered by supplying an excessively long argument to the ProductName parameter, which allows a remote unauthenticated attacker to execute arbitrary code on the client system when connecting to a vulnerable Juniper NetScreen IVE appliance.
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 dataall versionsCVSS 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
- Partial
- Integrity
- Partial
- Availability
- Partial
AV:N/AC:L/Au:N/C:P/I:P/A:P
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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Verify Juniper SSL-VPN client is installedSearch for JuniperSetup.dll, JuniperSetup.ocx, or JuniperSetupDLL.dll in the Windows system directory (typically C:\Windows\System32\) or check Program Files for Juniper Networks folderAffected if Any of these Juniper client DLL/OCX files exist on the system, indicating the vulnerable client software is present
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Check JuniperSetup control file versionRight-click on JuniperSetup.ocx or JuniperSetupDLL.dll, select Properties, and view the Version tab to obtain the file version numberAffected if The file exists and has any version number (as all versions of the control are affected)
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Locate registered Juniper Junipersetup Control in registryOpen Windows Registry Editor and navigate to HKEY_CLASSES_ROOT\JuniperSetup.JuniperSetupCtrl or search for 'JuniperSetup' under HKEY_CLASSES_ROOTAffected if The JuniperSetup ActiveX control is registered in the Windows registry, indicating the vulnerable component is installed
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Identify running Juniper client processesOpen Task Manager, look for processes such as JuniperSetup.exe, ncproct.exe, or other Juniper Network Connect related processes, or run 'tasklist /FI "IMAGENAME eq juniper*"' in command promptAffected if Any Juniper VPN client processes are running, confirming the client software is active and could be exploited when connecting to a vulnerable appliance
If the Juniper Junipersetup Control (JuniperSetup.dll, JuniperSetup.ocx, or JuniperSetupDLL.dll) is present on the system, the client is vulnerable since all versions of this control are affected by the buffer overflow flaw when connecting to a vulnerable Juniper NetScreen IVE appliance.
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 dataUpgrade Juniper NetScreen IVE OS to version 4.2r8.1, 5.0r6.1, 5.1r8, 5.2r4.1, or 5.3r2.1 or later. Alternatively, ensure only trusted VPN endpoints are accessed and monitor for unusual client behavior.
- Consultation2.0 h
- Implementation4.0 h
- Testing3.0 h
- Review / QA1.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2006-2086 — 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-2006-2086 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
- No weaponised exploit code, or anything meant to cause harm
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