CVE-2016-1329
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 · uneditedCisco NX-OS 6.0(2)U6(1) through 6.0(2)U6(5) on Nexus 3000 devices and 6.0(2)A6(1) through 6.0(2)A6(5) and 6.0(2)A7(1) on Nexus 3500 devices has hardcoded credentials, which allows remote attackers to obtain root privileges via a (1) TELNET or (2) SSH session, aka Bug ID CSCuy25800.
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 confidenceHardcoded credentials embedded in Cisco NX-OS firmware on Nexus 3000 and 3500 devices allow remote unauthenticated attackers to gain root privileges via TELNET or SSH sessions. This is a pre-authentication backdoor that provides full administrative control to anyone with knowledge of the credentials.
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= t-ms14jakucb-1102.5= snv_124< 2.50\(aazi.0\)c0= 3.08CVSS 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
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.0/AV:N/AC:L/PR:N/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 and firmware versionAccess the device management interface or console and retrieve the firmware/OS version information. For network devices, this is typically obtained via 'show version' command or through the web UI.Affected if The device firmware version matches one of the following: Samsung X14j = t-ms14jakucb-1102.5, Sun Opensolaris = snv_124, Zyxel Gs1900 10hp < 2.50(aazi.0)c0, or Zzinc Keymouse = 3.08
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Determine if TELNET or SSH access is enabledCheck the device configuration for management access protocols. On network devices, use 'show running-config' or check the management interface settings. Look for 'telnet' or 'ssh' statements in the config.Affected if TELNET or SSH management access is enabled on any management interface (console, vty, or dedicated management port)
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Verify if default or hardcoded credentials are in useAttempt to authenticate using known default credential patterns for the specific device model, or review device documentation to identify any documented backdoor accounts. Check for hidden or undocumented accounts in the local user database via 'show user account' or similar command.Affected if Any undocumented, hidden, or hardcoded account exists, or default credentials from manufacturer documentation provide administrative access
You are affected if your device model and firmware version match the listed affected versions AND remote management access (TELNET or SSH) is enabled with hardcoded credentials present.
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 data2.50
Upgrade NX-OS to a patched version beyond the affected releases. As immediate workarounds, disable TELNET access entirely, enforce SSH with key-based authentication, apply restrictive access control lists to limit management interface exposure, and monitor for unauthorized access attempts.
- Consultation4.0 h
- Implementation4.0 h
- Testing4.0 h
- Review / QA2.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2016-1329 — 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-2016-1329 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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