Hitachi Energy Reports Critical CoreTec Vulnerabilities
The company identified OS command injection and Dirty Frag flaws affecting multiple versions of its CoreTec products.
Updated on Oct. 29, 2026 in Cybersecurity
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Hitachi Energy has issued a security advisory regarding critical vulnerabilities in its CoreTec4 and CoreTec5 product lines. The security flaws, classified as OS command injection and Dirty Frag, pose risks to data confidentiality, integrity, and availability.
Why it matters
These vulnerabilities could allow unauthorized actors to compromise critical infrastructure hardware, potentially leading to unauthorized access or system instability. The disclosure aims to provide users with necessary information to mitigate risks within their own environments.
The affected software includes CoreTec5 versions 3.4.0 and 5.0.0, as well as CoreTec4 version 3.4.0 and earlier. Exploitation of these specific CVE-2026-13162 and CVE-2026-43284 entries could impact product confidentiality, integrity, and availability.
The players
Hitachi Energy
A global technology company that provides power grids and grid automation solutions.
CISA
The Cybersecurity and Infrastructure Security Agency is a U.S. federal agency tasked with protecting national infrastructure.
Hitachi India R&D Center
A research and development division of the Hitachi group that identified the vulnerabilities.
The details
The vulnerabilities were formally reported to CISA by the Hitachi India R&D Center to ensure broader visibility for users worldwide. CISA subsequently republished the advisory to assist organizations in identifying impacted hardware configurations.
Timeline
October 27, 2026: Hitachi Energy released the initial security advisory.
October 29, 2026: CISA published the security advisory online.
The Tech Race
This disclosure highlights the ongoing effort by industrial technology firms to secure legacy and active systems against emerging cyber threats. It follows the pattern set by the CISA Known Exploited Vulnerabilities Catalog to manage systemic risk in global hardware.
Operators using CoreTec equipment should review the advisory to determine if their specific version 3.4.0 or 5.0.0 deployment requires immediate attention. Users are encouraged to monitor manufacturer channels for upcoming firmware guidance.
The takeaway
Organizations should maintain updated asset inventories to quickly identify if they are running vulnerable software versions. Proactive engagement with manufacturer advisories is essential for maintaining the operational integrity of industrial control systems.
Further reading
For broader trends in infrastructure protection, visit the Cybersecurity section.
More information
For technical support regarding these vulnerabilities, reach out to the Hitachi Energy contact centers.
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