Security readout for executives and security teams
Plain-English summary
FANUC ROBOGUIDE can be forced into a denial-of-service condition when network requests exhaust heap memory on its receiving server. The issue affects availability, not data theft or tampering, based on the provided CVSS. Business urgency is highest where ROBOGUIDE supports engineering or production-adjacent workflows.
Executive priority
Treat this as a moderate availability risk for engineering operations. Prioritize exposure reduction and vendor guidance review, especially where ROBOGUIDE downtime could delay production planning, robotics validation, or operational change work.
Technical view
CVE-2021-43933 is a CWE-400 uncontrolled resource consumption flaw in FANUC ROBOGUIDE. Sources list all versions affected. The CVSS v3.1 score is 6.1 with network attack vector, high complexity, no privileges, required user interaction, changed scope, and high availability impact.
Likely exposure
Exposure is most likely on engineering workstations or simulation environments running FANUC ROBOGUIDE, especially if the receiving server is reachable from untrusted networks. The source bundle does not identify specific ports, configurations, or deployment patterns.
Exploitation context
CISA KEV status is false, and the supplied sources do not state active exploitation. The described attack is network-based request flooding/resource exhaustion, but CVSS marks complexity high and user interaction required, which reduces broad opportunistic risk.
Researcher notes
The available evidence supports a resource exhaustion denial-of-service issue only. Do not infer confidentiality or integrity impact. The bundle does not provide exploit details, proof-of-concept status, patch version, affected ports, or confirmed real-world exploitation.
Mitigation direction
- Check FANUC and CISA guidance for supported updates or workarounds.
- Restrict ROBOGUIDE network access to trusted engineering systems only.
- Block untrusted inbound access to the ROBOGUIDE receiving server.
- Segment simulation environments away from production and corporate networks.
- Monitor affected hosts for memory exhaustion and service interruption.
Validation and detection
- Inventory systems running FANUC ROBOGUIDE and record versions.
- Confirm whether ROBOGUIDE services are reachable from untrusted networks.
- Review firewall rules and segmentation around engineering workstations.
- Check logs and monitoring for unexplained memory exhaustion or crashes.
- Track FANUC/CISA advisory updates for remediation details.
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-400: Exact CWE lookup
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Open ATT&CK lookupCVE-2021-43933 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
- 6.1 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:N/I:N/A:H
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:H/PR:N/UI:R/S:C/C:N/I:N/A:H1.64Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.1MediumVector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:N/I:N/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://www.cisa.gov/uscert/ics/advisories/icsa-22-109-03CVE reference · x_refsource_MISC
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.
Uncontrolled Resource Consumption
Uncontrolled Resource Consumption represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.