CVE-2021-35535
published 2021-11-18CVE-2021-35535: Insecure Boot Image vulnerability in Hitachi Energy Relion Relion 670/650/SAM600-IO series allows an attacker who manages to get access to the front network…
PriorityP344high8.1CVSS 3.1
AVNACHPRNUINSUCHIHAH
EPSS
0.57%
42.7th percentile
Insecure Boot Image vulnerability in Hitachi Energy Relion Relion 670/650/SAM600-IO series allows an attacker who manages to get access to the front network port and to cause a reboot sequences of the device may exploit the vulnerability, where there is a tiny time gap during the booting process where an older version of VxWorks is loaded prior to application firmware booting, could exploit the vulnerability in the older version of VxWorks and cause a denial-of-service on the product. This issue affects: Hitachi Energy Relion 670 Series 2.2.2 all revisions; 2.2.3 versions prior to 2.2.3.3. Hitachi Energy Relion 670/650 Series 2.2.0 all revisions; 2.2.4 all revisions. Hitachi Energy Relion 670/650/SAM600-IO 2.2.1 all revisions.
Affected
14 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| hitachi_energy | relion_670_650_sam600-io | — | — |
| hitachi_energy | relion_670_650_series | — | — |
| hitachi_energy | relion_670_650_series | — | — |
| hitachi_energy | relion_670_series | — | — |
| hitachi_energy | relion_670_series | >= 2.2.3 < 2.2.3.3 | 2.2.3.3 |
| hitachienergy | relion_650_firmware | — | — |
| hitachienergy | relion_650_firmware | — | — |
| hitachienergy | relion_650_firmware | — | — |
| hitachienergy | relion_670_firmware | — | — |
| hitachienergy | relion_670_firmware | — | — |
| hitachienergy | relion_670_firmware | — | — |
| hitachienergy | relion_670_firmware | — | — |
| hitachienergy | relion_670_firmware | 2.2.3 – 2.2.3.3 | — |
| hitachienergy | relion_sam600-io_firmware | — | — |
CVSS provenance
nvdv3.18.1HIGHCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
nvdv2.06.8MEDIUMAV:N/AC:M/Au:N/C:P/I:P/A:P
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CISA ICS
Hitachi Energy Relion 670/650/SAM600-IO (Update A)
cisa_ics·2025-06-05·CVSS 8.1
[HIGH] Hitachi Energy Relion 670/650/SAM600-IO (Update A)
ICS Advisory
##
Hitachi Energy Relion 670/650/SAM600-IO (Update A)
Last RevisedJune 05, 2025
Alert CodeICSA-21-336-05
Related topics:
Industrial Control System Vulnerabilities, Industrial Control Systems
View CSAF
## 1. EXECUTIVE SUMMARY
- CVSS v4 8.9
- ATTENTION: Exploitable locally
- Vendor: Hitachi Energy
- Equipment: Relion 670/650/SAM600-IO
- Vulnerability: Initialization of a Resource with an Insecure Default
## 2. RISK EVALUATION
Successful exploitation of this vulnerability could hijack existing TCP sessions to inject packets of their choosing or cause denial-of-service conditions.
## 3. TECHNICAL DETAILS
## 3.1 AFFECTED PRODUCTS
Hitachi Energy reports this vulnerability affects the following Relion products:
- Relion 670/650 series: Version
GHSA
GHSA-v26g-w7c2-rjj3: Insecure Boot Image vulnerability in Hitachi Energy Relion Relion 670/650/SAM600-IO series allows an attacker who manages to get access to the front n
ghsa_unreviewed·2021-11-19
CVE-2021-35535 [MEDIUM] CWE-1188 GHSA-v26g-w7c2-rjj3: Insecure Boot Image vulnerability in Hitachi Energy Relion Relion 670/650/SAM600-IO series allows an attacker who manages to get access to the front n
Insecure Boot Image vulnerability in Hitachi Energy Relion Relion 670/650/SAM600-IO series allows an attacker who manages to get access to the front network port and to cause a reboot sequences of the device may exploit the vulnerability, where there is a tiny time gap during the booting process where an older version of VxWorks is loaded prior to application firmware booting, could exploit the vulnerability in the older version of VxWorks and cause a denial-of-service on the product. This issue affects: Hitachi Energy Relion 670 Series 2.2.2 all revisions; 2.2.3 versions prior to 2.2.3.3. Hitachi Energy Relion 670/650 Series 2.2.0 all revisions; 2.2.4 all revisions. Hitachi Energy Relion 670/650/SAM600-IO 2.2.1 all revisions.
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
2021-11-18
Published