Unified Computing SystemHardware / appliance · Cisco
CVE-2012-4086
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 setup script for fabric interconnect devices in Cisco Unified Computing System (UCS) allows remote attackers to execute arbitrary commands via invalid parameters, aka Bug ID CSCtg20790.
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 confidenceThe vulnerability exists in the setup script for Cisco Unified Computing System (UCS) fabric interconnect devices. The script fails to properly validate input parameters, allowing remote attackers to inject and execute arbitrary commands on affected devices.
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
Unified Computing SystemHardware / appliance
all 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
- High
- Authentication
- None
- Confidentiality
- Partial
- Integrity
- Partial
- Availability
- Partial
AV:N/AC:H/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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Confirm device is a Cisco UCS fabric interconnectIdentify the device model and type in the UCS management interface or via 'show version' command output. Look for references to 'fabric interconnect' or 'UCS' in the device identification.Affected if The device is identified as a Cisco Unified Computing System (UCS) fabric interconnect component.
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Check for setup script accessibilityLocate and review the setup script or initial configuration interface on the device. The vulnerability exists in the setup script that configures fabric interconnect parameters.Affected if The device has a setup or initial configuration script present and accessible.
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Inspect setup script for input validationExamine the setup script files (typically found in /etc or configuration directories) for how they handle user-provided parameters. Look for direct use of input variables in system calls without sanitization.Affected if The setup script contains commands that execute user-supplied input without proper validation or escaping.
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Review configuration management accessDetermine if the setup functionality is exposed through remote management interfaces (Web UI, CLI, API) that accept parameters during device configuration.Affected if The setup or configuration interface accepts external input that could be passed to system commands.
If the device is a Cisco UCS fabric interconnect with an accessible setup script or configuration interface that processes input without validation, the environment is affected by CVE-2012-4086.
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 the Cisco-provided patch or firmware update addressing Bug ID CSCtg20790 to remediate the command injection vulnerability in UCS fabric interconnect devices.
Fix this in Unified Computing System
Scoped from the published advisory
- Consultation4.0 h
- Implementation8.0 h
- Testing4.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $5,120.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2012-4086 — 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-2012-4086 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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A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.
- 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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