Security readout for executives and security teams
Plain-English summary
An unauthenticated remote person may be able to learn which usernames exist on a Franka Emika Robot. This can support later targeting, but the sources do not show takeover, data modification, outage, or active exploitation.
Executive priority
Treat as a moderate exposure management item, especially in robotics or operational environments. Prioritize confirming affected assets and reducing network reachability over emergency response unless vendor or monitoring evidence indicates broader risk.
Technical view
The issue is described as CWE-203: observable discrepancies in an authentication mechanism allow unauthenticated remote username enumeration. CVSS 3.1 is 5.3, network exploitable, low complexity, no privileges or user interaction, with low confidentiality impact only.
Likely exposure
Exposure appears limited to Franka Robotics Franka Emika Robot environments matching the CVE record. The bundle lists version 0.0.0 and default status unaffected, so confirm applicability with vendor guidance before assuming exposure.
Exploitation context
The CVE is not listed as KEV, and the provided sources do not state active exploitation. The supported risk is account discovery, which can aid follow-on attacks but is not itself credential compromise.
Researcher notes
The public bundle provides limited product/version detail and no named patch. Avoid broad product assumptions. Focus on confirming the authentication behavior, affected software lineage, and whether vendor advisories clarify real affected versions.
Mitigation direction
- Check Franka Robotics guidance for applicability, supported versions, and any available fix.
- Restrict robot management or authentication interfaces to trusted networks only.
- Apply vendor-provided updates or configuration changes when published.
- Monitor authentication telemetry for unusual username probing patterns.
- Use strong account controls and remove unnecessary user accounts.
Validation and detection
- Inventory Franka Emika Robot assets and record exposed management interfaces.
- Confirm model, software, and firmware details against the CVE and vendor guidance.
- Review external exposure for any robot authentication services.
- Check logs for repeated failed authentication attempts across many usernames.
- Document whether compensating controls limit unauthenticated network access.
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-203: Information exposure and cloud metadata lookup
Information exposure and SSRF weaknesses can make discovery, cloud metadata, and credential material review relevant. 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 lookupCVE-2021-47664 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
- 5.3 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/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:N/UI:N/S:U/C:L/I:N/A:N3.91.4Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
5.3MediumVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://www.sciencedirect.com/science/article/pii/S2351978921001657CVE reference
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.
Observable Discrepancy
Observable Discrepancy represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.