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 update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2021-33011 is rated Low Risk (28.2/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.39%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2021-33011

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.06% 0.39% +0.33%
2 2024-05-26 0.05% 0.06% +0.01%
3 2023-03-07 — 0.05% —

Full EPSS history (7 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2021-33011

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
4.3 3.1 MEDIUM
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L Click to expand
Attack vector (AV:A)
Attacker has to be nearby on the network—same office, same link, that vibe—not the whole wide internet.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:L)
Might cause slowdowns, glitches, or partial disruption—not a full brick.
 2.8 1.4 [email protected]
3.3 2.0 LOW
AV:A/AC:L/Au:N/C:N/I:N/A:P Click to expand
Access vector (AV:A)
Requires access to an adjacent network segment.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 6.5 2.9 [email protected]

Weakness enumeration for CVE-2021-33011

Affected software / configurations for CVE-2021-33011

Vendor Product Version Raw CPE
jtekt pc10g-cpu_tcc-6353_firmware — cpe:2.3:o:jtekt:pc10g-cpu_tcc-6353_firmware:*:*:*:*:*:*:*:*
jtekt pc10ge_tcc-6464_firmware — cpe:2.3:o:jtekt:pc10ge_tcc-6464_firmware:*:*:*:*:*:*:*:*
jtekt pc10p_tcc-6372_firmware — cpe:2.3:o:jtekt:pc10p_tcc-6372_firmware:*:*:*:*:*:*:*:*
jtekt pc10p-dp_tcc-6726_firmware — cpe:2.3:o:jtekt:pc10p-dp_tcc-6726_firmware:*:*:*:*:*:*:*:*
jtekt pc10p-dp-io_tcc-6752_firmware — cpe:2.3:o:jtekt:pc10p-dp-io_tcc-6752_firmware:*:*:*:*:*:*:*:*
jtekt pc10b-p_tcc-6373_firmware — cpe:2.3:o:jtekt:pc10b-p_tcc-6373_firmware:*:*:*:*:*:*:*:*
jtekt pc10b_tcc-1021_firmware — cpe:2.3:o:jtekt:pc10b_tcc-1021_firmware:*:*:*:*:*:*:*:*
jtekt pc10b-e\/c_tcu-6521_firmware — cpe:2.3:o:jtekt:pc10b-e\/c_tcu-6521_firmware:*:*:*:*:*:*:*:*
jtekt pc10e_tcc-4637_firmware — cpe:2.3:o:jtekt:pc10e_tcc-4637_firmware:*:*:*:*:*:*:*:*
jtekt pc10pe_tcc-1101_firmware — cpe:2.3:o:jtekt:pc10pe_tcc-1101_firmware:*:*:*:*:*:*:*:*
jtekt pc10pe-1616p_tcc-1102_firmware — cpe:2.3:o:jtekt:pc10pe-1616p_tcc-1102_firmware:*:*:*:*:*:*:*:*
jtekt ef10_tcu-6982_firmware — cpe:2.3:o:jtekt:ef10_tcu-6982_firmware:*:*:*:*:*:*:*:*
jtekt plus_cpu_tcc-6740_firmware — cpe:2.3:o:jtekt:plus_cpu_tcc-6740_firmware:*:*:*:*:*:*:*:*
jtekt plus_ex_tcu-6741_firmware — cpe:2.3:o:jtekt:plus_ex_tcu-6741_firmware:*:*:*:*:*:*:*:*
jtekt plus_ex2_tcu-6858_firmware — cpe:2.3:o:jtekt:plus_ex2_tcu-6858_firmware:*:*:*:*:*:*:*:*
jtekt plus_efr_tcu-6743_firmware — cpe:2.3:o:jtekt:plus_efr_tcu-6743_firmware:*:*:*:*:*:*:*:*
jtekt plus_efr2_tcu-6859_firmware — cpe:2.3:o:jtekt:plus_efr2_tcu-6859_firmware:*:*:*:*:*:*:*:*
jtekt plus_2p-efr_tcu-6929_firmware — cpe:2.3:o:jtekt:plus_2p-efr_tcu-6929_firmware:*:*:*:*:*:*:*:*
jtekt plus_bus-ex_tcu-6900_firmware — cpe:2.3:o:jtekt:plus_bus-ex_tcu-6900_firmware:*:*:*:*:*:*:*:*
jtekt fl\/et-t-v2h_thu-6289_firmware — cpe:2.3:o:jtekt:fl\/et-t-v2h_thu-6289_firmware:*:*:*:*:*:*:*:*
jtekt 2port-efr_thu-6404_firmware — cpe:2.3:o:jtekt:2port-efr_thu-6404_firmware:*:*:*:*:*:*:*:*
jtekt nano_10gx_tuc-1157_firmware — cpe:2.3:o:jtekt:nano_10gx_tuc-1157_firmware:*:*:*:*:*:*:*:*
jtekt nano_cpu_tuc-6941_firmware — cpe:2.3:o:jtekt:nano_cpu_tuc-6941_firmware:*:*:*:*:*:*:*:*
jtekt nano_2et_tuu-6949_firmware — cpe:2.3:o:jtekt:nano_2et_tuu-6949_firmware:*:*:*:*:*:*:*:*
jtekt nano_safety_tuc-1085_firmware — cpe:2.3:o:jtekt:nano_safety_tuc-1085_firmware:*:*:*:*:*:*:*:*
jtekt nano_safety_rs00ip_tuu-1086_firmware — cpe:2.3:o:jtekt:nano_safety_rs00ip_tuu-1086_firmware:*:*:*:*:*:*:*:*
jtekt nano_safety_rs01ip_tuu-1087_firmware — cpe:2.3:o:jtekt:nano_safety_rs01ip_tuu-1087_firmware:*:*:*:*:*:*:*:*

References for CVE-2021-33011

URL Tags
https://us-cert.cisa.gov/ics/advisories/icsa-21-245-02 Third Party Advisory US Government Resource
cvelogic Threat Intelligence