CVE-2021-27196
7.5 · HIGHOverview
CVE-2021-27196 is a high-severity vulnerability affecting hitachienergy relion_670_firmware. It was published on June 14, 2021 and has a CVSS 3.1 base score of 7.5 (HIGH).
This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical Description
Improper Input Validation vulnerability in Hitachi ABB Power Grids Relion 670 Series, Relion 670/650 Series, Relion 670/650/SAM600-IO, Relion 650, REB500, RTU500 Series, FOX615 (TEGO1), MSM, GMS600, PWC600 allows an attacker with access to the IEC 61850 network with knowledge of how to reproduce the attack, as well as the IP addresses of the different IEC 61850 access points (of IEDs/products), to force the device to reboot, which renders the device inoperable for approximately 60 seconds. This vulnerability affects only products with IEC 61850 interfaces. This issue affects: Hitachi ABB Power Grids Relion 670 Series 1.1; 1.2.3 versions prior to 1.2.3.20; 2.0 versions prior to 2.0.0.13; 2.1; 2.2.2 versions prior to 2.2.2.3; 2.2.3 versions prior to 2.2.3.2. Hitachi ABB Power Grids Relion 670/650 Series 2.2.0 versions prior to 2.2.0.13. Hitachi ABB Power Grids Relion 670/650/SAM600-IO 2.2.1 versions prior to 2.2.1.6. Hitachi ABB Power Grids Relion 650 1.1; 1.2; 1.3 versions prior to 1.3.
Remediation
Check the references section for vendor advisories and patches from hitachienergy. Update relion_670_firmware to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| hitachienergy | relion_670_firmware | >= 1.2.3, < 1.2.3.20 | Affected |
| hitachienergy | relion_650_firmware | >= 1.3, < 1.3.0.7 | Affected |
| hitachienergy | relion_sam600-io_firmware | >= 2.2.1, < 2.2.1.6 | Affected |
| hitachienergy | reb500_firmware | >= 7.3, < 7.60.19 | Affected |
| hitachienergy | fox615_tego1_firmware | >= 0, < r2a16 | Affected |
| hitachienergy | modular_switchgear_monitoring_firmware | >= 0, < 2.1.0 | Affected |
| hitachienergy | gms600_firmware | 0 | Affected |
| hitachienergy | pwc600_firmware | >= 1.0, < 1.0.1.4 | Affected |
References
Frequently Asked Questions
What is CVE-2021-27196?
CVE-2021-27196 is a high-severity vulnerability affecting hitachienergy relion_670_firmware. It was published on June 14, 2021 and has a CVSS 3.1 base score of 7.5 (HIGH).
How severe is CVE-2021-27196?
This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2021-27196?
Check the references section for vendor advisories and patches from hitachienergy. Update relion_670_firmware to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2021-27196?
CyberStrike's AI-powered security agents can automatically detect CVE-2021-27196 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
Automated penetration testing that runs continuously, not just quarterly.
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