Security readout for executives and security teams
Plain-English summary
Cisco DCNM has a high-severity command injection flaw in specific REST API endpoints. An authenticated remote attacker could cause the server to run operating-system commands with the logged-in user's privileges. This matters most for organizations using DCNM to manage data center networks.
Executive priority
Treat this as a high-priority infrastructure management-plane issue. If DCNM is deployed, confirm exposure and vendor remediation status promptly, because successful exploitation could compromise sensitive network-management data.
Technical view
CVE-2020-3384 is caused by insufficient validation of user-supplied input in Cisco DCNM REST API endpoints. The CVSS 3.1 score is 8.2 with network attack vector, low complexity, low privileges required, required user interaction, changed scope, and high confidentiality impact.
Likely exposure
Exposure is limited to Cisco Data Center Network Manager deployments with the affected REST API endpoints. The provided bundle does not identify affected versions, so asset inventory must be checked against Cisco's advisory.
Exploitation context
The bundle does not show CISA KEV listing or cited evidence of active exploitation. Exploitation requires authenticated remote access and a crafted API request; the CVSS vector also records user interaction as required.
Researcher notes
Source evidence confirms command injection in specific DCNM REST API endpoints, authenticated remote attack, and CVSS 8.2. The source bundle does not provide affected version ranges, exploit-in-the-wild evidence, or explicit fix details.
Mitigation direction
- Review Cisco's advisory for affected releases and official fixed-version guidance.
- Prioritize updates or mitigations recommended by Cisco for internet-reachable or broadly reachable DCNM systems.
- Restrict DCNM REST API access to trusted administration networks where operationally possible.
- Review DCNM account permissions and remove unnecessary access.
Validation and detection
- Identify all Cisco DCNM deployments and their software versions.
- Compare each deployment against Cisco's CVE-2020-3384 advisory.
- Confirm REST API endpoints are not exposed beyond required administrative access paths.
- Review DCNM authentication and audit logs for unusual API activity.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
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CWE-184: Exact CWE lookup
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Open ATT&CK lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2020-3384 mapping review
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Open ATT&CK lookup- Severity
- High
- CVSS
- 8.2 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:L
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:L2.35.3Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
8.2HighVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:L
Source materials
- CVE List V5 sourceCVE List V5
- 20200729 Cisco Data Center Network Manager Command Injection VulnerabilityCVE reference · vendor-advisory, x_refsource_CISCO
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Incomplete List of Disallowed Inputs
Incomplete List of Disallowed Inputs represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.