CVE-2021-27458

HIGH
7.5
CVSS Score
Published: April 19, 2021 at 09:07 PM UTC
Updated: June 17, 2026 at 03:44 AM UTC
37 products affected across 1 vendorPC10P Dp Io Tcc 6752 FirmwarePC10G CPU Tcc 6353 FirmwarePC10B Tcc 1021 Firmware

Using JTEKT Corporation TOYOPUC products by N/A?

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Severity
HIGH7.5
Exploit prediction
EPSS 1%

Description

If Ethernet communication of the JTEKT Corporation TOYOPUC product series’ (TOYOPUC-PC10 Series: PC10G-CPU TCC-6353: All versions, PC10GE TCC-6464: All versions, PC10P TCC-6372: All versions, PC10P-DP TCC-6726: All versions, PC10P-DP-IO TCC-6752: All versions, PC10B-P TCC-6373: All versions, PC10B TCC-1021: All versions, PC10B-E/C TCU-6521: All versions, PC10E TCC-4737: All versions; TOYOPUC-Plus Series: Plus CPU TCC-6740: All versions, Plus EX TCU-6741: All versions, Plus EX2 TCU-6858: All versions, Plus EFR TCU-6743: All versions, Plus EFR2 TCU-6859: All versions, Plus 2P-EFR TCU-6929: All versions, Plus BUS-EX TCU-6900: All versions; TOYOPUC-PC3J/PC2J Series: FL/ET-T-V2H THU-6289: All versions, 2PORT-EFR THU-6404: All versions) are left in an open state by an attacker, Ethernet communications cannot be established with other devices, depending on the settings of the link parameters.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

All versions
jtekt-2port-efr-thu-6404 (same device)
All versions
jtekt-fl-et-t-v2h-thu-6289 (same device)
All versions
jtekt-pc10b-e-c-tcu-6521 (same device)
All versions
jtekt-pc10b-p-tcc-6373 (same device)
All versions
jtekt-pc10b-tcc-1021 (same device)
All versions
jtekt-pc10e-tcc-4737 (same device)
All versions
jtekt-pc10g-cpu-tcc-6353 (same device)
All versions
jtekt-pc10ge-tcc-6464 (same device)
All versions
jtekt-pc10p-dp-io-tcc-6752 (same device)
All versions
jtekt-pc10p-dp-tcc-6726 (same device)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (1)

x_refsource_MISCThird Party AdvisoryUS Government Resource
https://us-cert.cisa.gov/ics/advisories/icsa-21-103-03

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-404

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