Security readout for executives and security teams
Plain-English summary
CVE-2021-1559 affects Cisco DNA Spaces Connector. A highly privileged remote user could abuse weak input sanitization to run unauthorized commands. Successful exploitation runs commands as root inside the Connector Docker container, creating serious local impact but requiring existing high-level access.
Executive priority
Treat this as a targeted administrative-access risk, not an internet-wide emergency based on the provided evidence. Prioritize inventory, privileged-access review, and Cisco-supported remediation because successful exploitation grants root command execution inside the Connector container.
Technical view
The issue is CWE-78 command injection in Cisco DNA Spaces Connector command execution paths. The CVSS v3.1 score is 6.5 with network attack vector, low complexity, high privileges required, no user interaction, and high confidentiality and integrity impact without availability impact.
Likely exposure
Exposure is limited to organizations running Cisco DNA Spaces Connector where attackers can obtain or misuse high-privileged authenticated access. The provided sources do not identify affected version ranges or deployment prerequisites beyond the product name.
Exploitation context
The source bundle does not show CISA KEV listing or active exploitation. Exploitation requires authenticated remote access with high privileges and crafted input during affected command execution. Public exploit availability is not established by the provided sources.
Researcher notes
Key evidence is limited to the CVE record and Cisco advisory reference. The affected version field is not specified in the bundle. Avoid assuming patch names, vulnerable builds, exploit maturity, or container escape impact unless confirmed by Cisco or another cited source.
Mitigation direction
- Review Cisco's advisory for vendor-supported fixes or workarounds.
- Inventory Cisco DNA Spaces Connector deployments in production and lab environments.
- Restrict high-privileged Connector access to trusted administrators only.
- Audit privileged account ownership and remove unnecessary access.
- Monitor Cisco advisory updates for affected version and remediation details.
Validation and detection
- Confirm whether Cisco DNA Spaces Connector is deployed.
- Identify Connector versions and compare them with Cisco's advisory.
- Review who has high-privileged remote access to the Connector.
- Check administrative logs for unexpected command execution activity.
- Document remediation status for each Connector instance.
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
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-78: Command execution behavior lookup
Command injection weaknesses can lead defenders to review execution techniques and command interpreter telemetry. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
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 lookupContainer behavior lookup
The affected technology mentions containers, so container-specific ATT&CK technique review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2021-1559 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 6.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N
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:H/UI:N/S:U/C:H/I:H/A:N1.25.2Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.5MediumVector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N
Source materials
- CVE List V5 sourceCVE List V5
- 20210519 Cisco DNA Spaces Connector Command Injection VulnerabilitiesCVE 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.
Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.