Which Hitachi Energy REB500 versions are affected by CISA advisory ICSA-26-279-05?
CISA advisory ICSA-26-279-05 covers Hitachi Energy REB500 versions up to and including 8.3.3.1.
The affected version range
If the REB500 version is 8.3.3.1 or lower, it is within the affected range stated in the advisory.
CISA lists two vulnerabilities:
- CVE-2024-8176
- CVE-2025-59375
What the advisory says about impact
The source says the weaknesses come from open-source software components affecting the product. It also states that exploitation can be used for denial-of-service attacks.
Who should check
CISA identifies the energy sector as the relevant critical infrastructure sector and says deployment is worldwide.
Check the current CISA advisory before making operational decisions, since security guidance can be updated.
What should energy-sector operators do if they use Hitachi Energy REB500 versions up to 8.3.3.1?
If your organization uses Hitachi Energy REB500 versions up to and including 8.3.3.1, the CISA advisory applies to that version range.
Practical next steps
Start with the basics:
- Identify the REB500 version in use.
- Check whether it is 8.3.3.1 or earlier.
- Review CISA advisory ICSA-26-279-05 for current official guidance.
- Consider the stated impact: CISA says exploitation can be used for denial-of-service attacks.
Why energy-sector operators are named
CISA identifies the energy sector as the relevant critical infrastructure sector. The advisory also says deployment is worldwide, so the issue is not described as limited to one country or region.
What is confirmed and what is not
The available context confirms the affected version range, two CVEs, the open-source software component source of the weaknesses, and denial-of-service impact. It does not provide remediation steps in this prompt, so use the CISA advisory page for the latest instructions.
What changed in the October 06, 2026 CISA advisory for Hitachi Energy REB500?
CISA issued ICS advisory ICSA-26-279-05 for Hitachi Energy REB500 on October 06, 2026.
What the advisory covers
The advisory concerns REB500 versions up to and including 8.3.3.1.
It lists two vulnerabilities:
- CVE-2024-8176
- CVE-2025-59375
What changed for readers
The advisory gives operators a defined version range to check and describes the source of the weaknesses as open-source software components affecting the product.
CISA states that exploitation can be used for denial-of-service attacks.
Sector and deployment details
The advisory identifies the energy sector and says deployment is worldwide.
For any newer mitigation language or updates after publication, use the current CISA advisory page.
Sources / Learn more
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