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Fencer Intel
medium 6.0

CVE-2021-35530 json

User authentication bypass in TXpert Hub CoreTec 4

published 4y ago modified 4mo ago also EUVD-2021-22166

cvss
6.0
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 12%
public exploits
0
none known

Summary

A vulnerability in the application authentication and authorization mechanism in Hitachi Energy's TXpert Hub CoreTec 4, that depends on a token validation of the session identifier, allows an unauthorized modified message to be executed in the server enabling an unauthorized actor to change an existing user password, and further gain authorized access into the system via login mechanism. This issue affects: Hitachi Energy TXpert Hub CoreTec 4 version 2.0.0 2.1.0; 2.1.0; 2.1.1; 2.1.2; 2.1.3; 2.2.0; 2.2.1.

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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-22-249-04 updated cvss 6.0

Hitachi Energy TXpert Hub CoreTec 4

  • Hitachi Energy TXpert Hub CoreTec 4 2.2.0, 2.2.1, 2.0.0, 2.0.1, 2.1.0, 2.1.1, 2.1.2, 2.1.3
    affected: vendor fix, mitigation “Physically protect process control systems from unauthorized direct access.” search.abb.com

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

0.22% chance of exploitation in the next 30 days, higher than 12% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.1 6.0 CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:L
NVD 3.1 6.7 CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 7.2 AV:L/AC:L/Au:N/C:C/I:C/A:C

Affected products

  • Hitachi Energy TXpert Hub CoreTec 4 version

Classification

Weakness
  • CWE-288 Authentication Bypass Using an Alternate Path or Channel

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.