Security readout for executives and security teams
Plain-English summary
This flaw affects FANUC robot controllers used in industrial environments. A remote attacker could potentially cause unauthorized code execution, but the published CVSS vector rates attack complexity as high. Remediation appears operationally disruptive because the source description notes INIT START/restore from backup is required.
Executive priority
Prioritize within industrial risk management because compromise could affect robot controller integrity or availability. Schedule with operations because remediation may require disruptive restore activity.
Technical view
CVE-2021-32998 is a CWE-787 out-of-bounds write in FANUC R-30iA and R-30iB controller families. The CVSS 3.1 vector is AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H, indicating network reachability, no privileges, high complexity, and integrity/availability impact without confidentiality impact.
Likely exposure
Exposure is most likely where affected FANUC controllers are reachable over networks by untrusted or poorly segmented hosts. Affected versions listed are R-30iA v7, R-30iB v8, and R-30iB Plus family V9 variants.
Exploitation context
The bundle does not show CISA KEV listing or active exploitation evidence. The described impact is serious, but CVSS marks attack complexity high. No exploit details are provided in the supplied sources.
Researcher notes
Evidence supports remote arbitrary code execution potential via out-of-bounds write, but supplied data lacks patch identifiers, exploit maturity, and detailed attack preconditions beyond high complexity. Avoid assuming affected products beyond the listed FANUC controller families.
Mitigation direction
- Check CISA and FANUC guidance for the official remediation for each controller family.
- Inventory affected R-30iA, R-30iB, and R-30iB Plus controllers and firmware versions.
- Plan maintenance carefully; the description notes INIT START/restore from backup is required.
- Reduce network reachability to affected controllers until vendor remediation is confirmed.
Validation and detection
- Confirm controller model and version against the affected product list.
- Verify whether any affected controller is reachable from non-industrial or remote-access networks.
- Check whether remediation requiring INIT START/restore from backup has been completed.
- Document compensating controls where vendor remediation is not yet scheduled.
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-787: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. 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 lookupCVE-2021-32998 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
- High
- CVSS
- 7.4 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/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:N/S:U/C:N/I:H/A:H2.25.2Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.4HighVector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://www.cisa.gov/uscert/ics/advisories/icsa-21-243-02CVE 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.
Out-of-bounds Write
Out-of-bounds Write represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.