Dna Spaces\Application · Cisco
CVE-2021-1559
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 Cisco DNA Spaces Connector could allow an authenticated, remote attacker to perform a command injection attack on an affected device. These vulnerabilities are due to insufficient input sanitization when executing affected commands. A high-privileged attacker could exploit these vulnerabilities on a Cisco DNA Spaces Connector by injecting crafted input during command execution. A successful exploit could allow the attacker to execute arbitrary commands as root within the Connector docker container.
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 confidenceMultiple command injection vulnerabilities in Cisco DNA Spaces Connector allow an authenticated, high-privileged attacker to inject crafted input during command execution. The vulnerabilities stem from insufficient input sanitization, enabling arbitrary command execution as root within the Connector docker container.
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
Dna Spaces\Application
< 2.0.519CVSS 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
- High
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:H/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 if Cisco DNA Spaces Connector is installedCheck for Docker containers running DNA Spaces or look for the installation directory. Common locations: /opt/cisco/dnaspaces or check 'docker ps' for container named 'dna-spaces-connector'Affected if DNA Spaces Connector Docker container or installation exists on the system
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Determine the installed version of DNA Spaces ConnectorCheck the version file or container tag: run 'docker ps --format "{{.Image}}"' or look for version information in /opt/cisco/dnaspaces/version.txt if accessibleAffected if The version is below 2.0.519 (for example, 2.0.500, 2.0.418, etc.)
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Verify the management interface is accessibleCheck if the DNA Spaces Connector admin UI or API is exposed by reviewing reverse proxy configurations, firewall rules, or listening ports (typically ports 443 or 8080)Affected if The management interface is reachable from untrusted networks and authentication is enabled
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Review audit and access logs for suspicious commandsExamine DNA Spaces Connector logs for unexpected command execution patterns or unauthorized admin actions. Check logs in /var/log/dnaspaces/ or via 'docker logs' for the connector containerAffected if Logs show commands or API calls that were not initiated by legitimate administrators
The environment is affected if Cisco DNA Spaces Connector version below 2.0.519 is installed and the command execution feature is accessible to authenticated high-privileged users.
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 data2.0.519
Apply Cisco-provided patches for DNA Spaces Connector when available. Until patched, restrict access to trusted administrators only and monitor for unauthorized command execution.
Fix this in Dna Spaces\
Scoped from the published advisory
- Consultation3.0 h
- Implementation2.0 h
- Testing2.0 h
- Review / QA2.0 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-2021-1559 — 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-2021-1559 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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- Version or environment caveats, and links to real fixes
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