Nx OsOperating system · Cisco
CVE-2013-5496
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 · uneditedOpen Network Environment Platform (ONEP) in Cisco NX-OS allows remote authenticated users to cause a denial of service (network-element reload) via a crafted packet, aka Bug ID CSCui51551.
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 confidenceOpen Network Environment Platform (ONEP) in Cisco NX-OS contains a vulnerability where remote authenticated users can send specially crafted packets that cause the network element to reload, resulting in denial of service.
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
Nx OsOperating system
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
- M
- Authentication
- Single
- Confidentiality
- None
- Integrity
- None
- Availability
- Complete
AV:N/AC:M/Au:S/C:N/I:N/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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Confirm Cisco NX-OS is runningRun 'show version' or 'show system uptime' command to verify the operating systemAffected if The device is running Cisco NX-OS (the vulnerability only affects NX-OS)
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Check NX-OS versionRun 'show version | include NX-OS' or 'show version' to display the installed NX-OS versionAffected if Any version of Cisco NX-OS is installed (advisory states all versions are affected)
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Verify ONEP feature statusRun 'show feature | include onePK' or 'show feature | include onep' to check if the Open Network Environment Platform feature is enabledAffected if The ONEP/onePK feature is enabled (the vulnerability exists in this component)
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Check for remote access authentication methodsReview 'show users' and 'show running-config | include username' to identify configured authentication methods for remote accessAffected if Remote authentication methods are configured, allowing authenticated users to send packets to the device
The environment is affected if the device runs Cisco NX-OS with the ONEP feature enabled and accepts remote authenticated access, since all NX-OS versions contain the vulnerability in the ONEP component.
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 relevant Cisco patch or upgrade to a fixed version of NX-OS as specified in Cisco's security advisory for CSCui51551. Implement network segmentation and access controls to limit exposure to authenticated attackers.
Fix this in Nx Os
Scoped from the published advisory
- Consultation3.0 h
- Implementation3.0 h
- Testing2.0 h
- Review / QA1.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $2,592.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2013-5496 — 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-2013-5496 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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