Cyber Resilience

CVE-2021-32998

High

Published: 10 January 2022

Published
10 January 2022
Modified
17 April 2025
KEV Added
—
Patch
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CVSS Score v3.1 7.4 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H
EPSS Score 0.0039 60.2th percentile
Risk Priority 15 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2021-32998 is a high-severity Out-of-bounds Write (CWE-787) vulnerability in Fanuc R-30Ib Mate Firmware. Its CVSS base score is 7.4 (High).

Operationally, ranked in the top 39.8% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.

EU & UK References

Vulnerability details

The FANUC R-30iA and R-30iB series controllers are vulnerable to an out-of-bounds write, which may allow an attacker to remotely execute arbitrary code. INIT START/restore from backup required.

CWE(s)
CWE-787

Related Threats

No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.

Affected Assets

fanuc
r-30ia firmware
7.20, 7.30, 7.40, 7.43, 7.50
fanuc
r-30ia mate firmware
7.20, 7.30, 7.40, 7.43, 7.50
fanuc
r-30ib mate firmware
8.10, 8.13, 8.20, 8.23, 8.26
fanuc
r-30ib compact firmware
8.10, 8.13, 8.20, 8.23, 8.26
fanuc
r-30ib firmware
8.10, 8.13, 8.20, 8.23, 8.26
fanuc
r-30ib mate plus firmware
9.10, 9.13, 9.16, 9.30, 9.36
fanuc
r-30ib compact plus firmware
9.10, 9.13, 9.16, 9.30, 9.36
fanuc
r-30ib mini plus firmware
9.10, 9.13, 9.16, 9.30, 9.36
fanuc
r-30ib plus firmware
9.10, 9.13, 9.16, 9.30, 9.36

Mitigating Controls

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

SI-16 Memory Protection
addresses: CWE-787

Out-of-bounds writes that corrupt control flow or inject shellcode are rendered non-executable by the same memory protections.

References