Data Center Network ManagerApplication · Cisco
CVE-2021-1270
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 · uneditedMultiple vulnerabilities in the web-based management interface of Cisco Data Center Network Manager (DCNM) could allow an authenticated, remote attacker to view, modify, and delete data without proper authorization. For more information about these vulnerabilities, see the Details section of this advisory.
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 · moderate confidenceMultiple authorization bypass vulnerabilities in Cisco DCNM's web-based management interface allow authenticated attackers to view, modify, and delete data without proper authorization. These appear to be Insecure Direct Object Reference (IDOR) or broken access control issues where the application fails to validate user permissions on specific resources or operations.
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
< 11.5\(1\)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
- None
- Integrity
- High
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
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.
-
Confirm Cisco DCNM installationIdentify whether Cisco Data Center Network Manager is installed in your environment. Check for DCNM processes, services, or the web application accessible on typical ports (443, 8080).Affected if DCNM is installed and running
-
Determine DCNM versionAccess the DCNM web interface and navigate to the About or Administration section to find the installed version number, or use the command line if you have server access: 'dcnm-version' or check installation logs.Affected if The installed version is lower than 11.5(1)
-
Verify web management interface is accessibleAttempt to access the DCNM web-based management interface via HTTPS/HTTP using the appliance IP or hostname. Confirm the login page loads.Affected if The DCNM web interface is reachable and responds to requests
-
Review user account privilegesLog into DCNM with an authenticated account and navigate to Administration > User Management or similar to review assigned roles and permissions for each user.Affected if Any user account has permissions that exceed their intended role, or the application allows unauthorized access to resources based solely on knowing object identifiers
Your environment is affected if Cisco DCNM is installed with a version lower than 11.5(1) and the web-based management interface is accessible, regardless of user privilege level.
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 data11.5
Apply Cisco's official patches for DCNM. If immediate patching is not possible, restrict web interface access to trusted users only via network segmentation or VPN, and audit user accounts for unnecessary privileges.
Fix this in Data Center Network Manager
Scoped from the published advisory
- Consultation4.0 h
- Implementation16.0 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 $8,960.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2021-1270 — 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-2021-1270 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
Be the first to add a field note for this CVE — a mitigation you’ve verified, a version caveat, or a link to a working fix. Sign in above to contribute.
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
- No spam, self-promotion, credentials, or personal data