Security readout for executives and security teams
Plain-English summary
This CVE affects FANUC industrial robot controllers. A network-reachable controller can crash because of integer coercion errors, requiring a restart. The business risk is production disruption, not data theft, because the published impact is availability only.
Executive priority
Treat this as a high-priority availability risk for industrial operations using affected FANUC controllers. The main concern is unplanned robot controller downtime and restart-driven production interruption, especially in plants where controllers are network-reachable or hard to restart safely.
Technical view
CVE-2021-32996 is a CWE-192/CWE-681 integer conversion issue in FANUC R-30iA and R-30iB controller families. The CVSS 3.1 vector is AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H, indicating unauthenticated network-triggerable denial of service with high availability impact.
Likely exposure
Exposure is most likely where affected FANUC R-30iA/R-30iA Mate v7, R-30iB family v8, or R-30iB Plus family V9 controllers are reachable over a network. Internet exposure would increase urgency, but the provided sources do not state typical deployment exposure.
Exploitation context
The provided bundle does not show CISA KEV listing or any cited evidence of active exploitation. The CVSS vector suggests low-complexity remote denial of service, but the sources only describe crashing behavior and required restart, not real-world exploitation.
Researcher notes
Evidence is limited to the supplied CVE and CISA advisory references. The bundle names affected FANUC controller families and versions, CVSS, and CWE categories, but does not include patch details, exploit observations, CPEs, or protocol-level technical detail.
Mitigation direction
- Inventory FANUC R-30iA and R-30iB controller models and firmware versions.
- Check FANUC and CISA advisory guidance for supported fixes or compensating controls.
- Restrict network access to affected controllers to authorized industrial management paths.
- Prioritize segmentation for controllers supporting safety-critical or production-critical robotics.
- Ensure restart and production recovery procedures are current and tested.
Validation and detection
- Confirm whether deployed controllers match the affected v7, v8, or V9 product families.
- Review network paths to determine whether affected controllers are remotely reachable.
- Check operational logs and maintenance records for unexplained controller crashes or restarts.
- Verify whether vendor guidance has been applied or documented as unavailable.
- Record affected production lines and expected downtime impact if restart is required.
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-192: 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 lookupCWE-681: 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 lookupCVE-2021-32996 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
- 7.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/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:L/PR:N/UI:N/S:U/C:N/I:N/A:H3.93.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.5HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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.
Integer Coercion Error
Integer Coercion Error represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.
Incorrect Conversion between Numeric Types
Incorrect Conversion between Numeric Types represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.