Digital Network Architecture CenterApplication · Cisco
CVE-2019-1848
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 Cisco Digital Network Architecture (DNA) Center could allow an unauthenticated, adjacent attacker to bypass authentication and access critical internal services. The vulnerability is due to insufficient access restriction to ports necessary for system operation. An attacker could exploit this vulnerability by connecting an unauthorized network device to the subnet designated for cluster services. A successful exploit could allow an attacker to reach internal services that are not hardened for external access.
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 confidenceCisco DNA Center contains an authentication bypass vulnerability where insufficient access restrictions on ports required for cluster services allow an unauthenticated adjacent attacker to bypass authentication and access critical internal services by connecting an unauthorized device to the cluster services subnet.
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
Digital Network Architecture CenterApplication
< 1.3CVSS 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
- Adjacent
- Complexity
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Changed
- Confidentiality
- High
- Integrity
- High
- Availability
- None
CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:C/C:H/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.
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Identify Cisco DNA Center installationLocate and confirm Cisco DNA Center is deployed in your environment. Check for the application in your inventory or network documentation.Affected if DNA Center is present and version cannot be determined or is below 1.3
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Determine installed DNA Center versionAccess the DNA Center admin interface or use the CLI command 'show version' to retrieve the current software version. Compare the version number against the affected range (all versions prior to 1.3).Affected if The installed version is lower than 1.3 (for example, 1.2.x, 1.1.x, or 1.0.x)
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Verify cluster services port access controlsReview firewall rules, ACLs, or network access controls that govern the ports used for DNA Center cluster services. Identify which devices or subnets are permitted to communicate on these ports.Affected if Cluster services ports (required for inter-node communication) are accessible from subnets or devices outside the authorized DNA Center cluster infrastructure
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Inspect cluster services subnet segmentationExamine network segmentation between the DNA Center cluster services subnet and adjacent network segments. Determine if unauthorized devices can be physically or logically connected to this subnet.Affected if The cluster services subnet is not isolated or is reachable by unauthorized adjacent network devices
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Confirm authentication enforcement on cluster interfacesTest or review whether cluster service interfaces require authentication for access. Verify that connections from unauthorized devices are rejected or properly authenticated.Affected if Unauthenticated or unauthorized devices can establish connections to cluster services without credentials
You are affected if Cisco DNA Center version 1.3 or later is NOT installed AND the cluster services network lacks proper segmentation or access controls allowing unauthorized adjacent devices to reach cluster service ports.
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.
dbcve · scoped1.3
Implement strict network segmentation to restrict access to the cluster services subnet to only authorized DNA Center components, and apply firewall rules or ACLs to limit which devices can communicate on the affected ports.
Cisco DNA Center version 1.3 or later
- Upgrade Cisco DNA Center to version 1.3 or later to address the authentication bypass vulnerability
- After upgrade, verify that access controls on cluster service ports are properly configured
- Review network segmentation to ensure only authorized devices can connect to the cluster services subnet
Generated from the published advisory — verify against the referenced sources before acting.
Fix this in Digital Network Architecture Center
Scoped from the published advisory
- Consultation6.0 h
- Implementation12.0 h
- Testing6.0 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 $7,968.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2019-1848 — 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-2019-1848 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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