What is CVE-2021-33011?

CVE-2021-33011 is a medium-severity vulnerability in Jtekt 2port-Efr Thu-6404, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 4.3/10. Published 2021-09-10.

How severe is CVE-2021-33011?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Resource exhaustion in Jtekt 2port-Efr Thu-6404

CVE-2021-33011

All versions of the afffected TOYOPUC-PC10 Series,TOYOPUC-Plus Series,TOYOPUC-PC3J/PC2J Series, TOYOPUC-Nano Series products may not be able to properly process an ICMP flood, which may allow an attacker to deny Ethernet communications between affected devices.

Published 2021-09-10 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.

EPSS exploit prediction

EPSS: 0.004 (33.1th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 33rd percentile — 33.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-770 — Allocation of Resources Without Limits or Throttling

References

us-cert.cisa.gov/ics/advisories/icsa-21-245-02 (US Government Resource, Third Party Advisory)

Frequently asked questions

What is CVE-2021-33011?: CVE-2021-33011 is a medium-severity vulnerability in Jtekt 2port-Efr Thu-6404, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 4.3/10. Published 2021-09-10.
How severe is CVE-2021-33011?: Medium severity. CVSS v3 base score is 4.3 out of 10.