Data Center Network ManagerApplication · Cisco
CVE-2020-3377
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 vulnerability in the Device Manager application of Cisco Data Center Network Manager (DCNM) could allow an authenticated, remote attacker to inject arbitrary commands on the affected device. The vulnerability is due to insufficient validation of user-supplied input. An attacker could exploit this vulnerability by sending crafted arguments to a specific field within the application. A successful exploit could allow the attacker to run commands as the administrator on the DCNM.
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 confidenceCommand injection vulnerability in Cisco DCNM Device Manager application where insufficient validation of user-supplied input allows an authenticated attacker to send crafted arguments to specific fields and execute arbitrary commands with administrator privileges.
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
Data Center Network ManagerApplication
= 11.0\(1\)= 11.1\(1\)= 11.2\(1\)= 11.3\(1\)CVSS 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
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:L/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 DCNM installation versionLog into the Cisco DCNM web interface and navigate to Administration > DCNM Server Settings, or run 'show version' via the DCNM CLI if you have access, to retrieve the installed software version.Affected if The version displayed is 11.0(1), 11.1(1), 11.2(1), or 11.3(1).
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Verify Device Manager application is accessibleConfirm the DCNM Device Manager application component is installed and accessible. In the DCNM web UI, check if the Device Manager functionality is available under the Applications or Resources section.Affected if Device Manager is present and enabled in the DCNM installation.
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Confirm DCNM user authentication is enabledCheck the DCNM authentication configuration under Administration > Security > User Management or similar path in the web interface to verify that user authentication is configured and active.Affected if User authentication is configured, as the vulnerability requires an authenticated attacker.
You are affected if your DCNM version matches exactly 11.0(1), 11.1(1), 11.2(1), or 11.3(1), the Device Manager application is enabled, and user authentication is active.
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 security update/patch for DCNM. Restrict administrative access to trusted personnel and implement network segmentation to limit exposure.
Fix this in Data Center Network Manager
Scoped from the published advisory
- Consultation6.0 h
- Implementation4.0 h
- Testing8.0 h
- Review / QA4.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $6,144.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2020-3377 — 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-2020-3377 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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