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Fencer Intel
high 7.5

CVE-2021-27458 json

If Ethernet communication of the JTEKT Corporation TOYOPUC product series’ (TOYOPUC-PC10 Series: PC10G-CPU TCC-6353: All versions, PC10GE T…

published 5y ago modified 4mo ago also EUVD-2021-14212

cvss
7.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.1%
EPSS 1.1% chance of exploitation in 30 days, percentile 66%
public exploits
0
none known

Summary

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.

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-21-103-03 updated cvss 7.5

JTEKT TOYOPUC products

  • JTEKT Corporation 2PORT-EFR THU-6404 JTEKT Corporation FL/ET-T-V2H THU-6289 JTEKT Corporation PC10B TCC-1021 JTEKT Corporation PC10B-E/C TCU-6521 JTEKT Corporation PC10B-P TCC-6373 JTEKT Corporation PC10E TCC-4737
    +12 more products
    JTEKT Corporation PC10G-CPU TCC-6353 JTEKT Corporation PC10GE TCC-6464 JTEKT Corporation PC10P TCC-6372 JTEKT Corporation PC10P-DP TCC-6726 JTEKT Corporation PC10P-DP-IO TCC-6752 JTEKT Corporation Plus 2P-EFR TCU-6929 JTEKT Corporation Plus BUS-EX TCU-6900 JTEKT Corporation Plus CPU TCC-6740 JTEKT Corporation Plus EFR TCU-6743 JTEKT Corporation Plus EFR2 TCU-6859 JTEKT Corporation Plus EX TCU-6741 JTEKT Corporation Plus EX2 TCU-6858
    affected: mitigation “JTEKT Corporation recommends users to use the following workaround:”

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

Exploit prediction

1.15% chance of exploitation in the next 30 days, higher than 66% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P

Affected products

  • n/a JTEKT Corporation TOYOPUC products

Classification

Weakness
  • CWE-404 Improper Resource Shutdown or Release

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.