How severe is CVE-2021-33011?

CVE-2021-33011 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.

Is CVE-2021-33011 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (33rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-33011?

CVE-2021-33011 primarily affects Jtekt Pc10g-cpu Tcc-6353 Firmware. In total, 27 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-33011?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-33011 published?

CVE-2021-33011 was published on 2021-09-10 and last updated on 2026-06-17.

CVE-2021-33011

CVE-2021-33011 is a medium-severity vulnerability in Jtekt Pc10g-cpu Tcc-6353 Firmware with a CVSS 3.x base score of 4.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-770.

Key facts

Severity: Medium (CVSS 3.x base score 4.3)
CVSS v2: 3.3
EPSS exploit prediction: 0% (33rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-770
Affected product: Jtekt Pc10g-cpu Tcc-6353 Firmware
Published: 2021-09-10
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is 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.
How severe is CVE-2021-33011?: CVE-2021-33011 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.
Is CVE-2021-33011 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (33rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-33011?: CVE-2021-33011 primarily affects Jtekt Pc10g-cpu Tcc-6353 Firmware. In total, 27 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-33011?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-33011 published?: CVE-2021-33011 was published on 2021-09-10 and last updated on 2026-06-17.

References

https://us-cert.cisa.gov/ics/advisories/icsa-21-245-02

Affected products (27)

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

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