Hitachi Energy CoreTec Product

View CSAF Summary Hitachi Energy is aware of OS command injection and Dirty Frag vulnerabilities that affect CoreTec product versions listed in this document. Successful exploitation of these vulnerabilities could result in impact on confidentiality, integrity and availability of the product. Please refer to the Recommended Immediate Actions for information about the mitigation/remediation. The following versions of Hitachi Energy CoreTec Product are affected: CoreTec5 vers:CoreTec5/<=3.4.0, 5.0.0 (CVE-2026-13162, CVE-2026-43284) CoreTec4 vers:CoreTec4/<=3.4.0 (CVE-2026-13162) CVSS Vendor Equipment v3 8.8 Hitachi Energy CoreTec5 2 Vulnerabilities Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection'), Write-what-where Condition Background Critical Infrastructure Sectors: Energy Countries/Areas Deployed: Worldwide Company Headquarters Location: Switzerland Vulnerabilities Expand All + CVE-2026-13162 An OS command vulnerability exists in CoreTec product that allows authenticated users with certain roles to execute arbitrary system commands with full control over the device. The vulnerability exists in the configuration daemon's time synchronization handler, which is responsible for setting the system timezone. When processing timezone configuration updates, the daemon constructs a shell command by concatenating user-supplied input without any sanitization or validation. Read More 2 Affected Products CoreTec5 versions 3.4.0 and prior Product Status: fixed, known_affected, recommended Remediations Vendor fix Update to CoreTec5 version 5.0.0 CoreTec4 versions 3.4.0 and prior Product Status: fixed, known_affected, recommended Remediations Vendor fix Upgrade to CoreTec5 version 5.0.0 Mitigation Follow general mitigation factors Additional Metrics Relevant CWE: CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') CVSS Version Base Score Base Severity Vector String 3.1 7.5 HIGH CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H 4.0 7.7 HIGH CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N View CVE Details CVE-2026-43284 A vulnerability exists in the IPsec ESP subsystem (esp4) of the Linux kernel used in CoreTec5 that allows a local unprivileged user to escalate privileges to root. The flaw exists in how the kernel handles memory pages when processing ESP encrypted network packets. An attacker can craft a packet that causes the kernel to decrypt data directly into memory pages it does not own, including cached copies of privileged operating system binaries. When one of those binaries is executed, the attacker's injected code runs with root privileges. In CoreTec5, the vulnerable ESP component is compiled in kernel as a built-in and is present at boot time allowing a local user to exploit it. Read More 3 Affected Products CoreTec5 versions 3.4.0 and prior Product Status: fixed, known_affected, recommended Remediations Vendor fix Update to CoreTec5 version 5.0.0 CoreTec4 versions 3.4.0 and prior Product Status: fixed, known_affected, recommended Remediations CoreTec5 versions 3.4.0 and prior Product Status: fixed, known_affected, recommended Remediations Vendor fix Update to CoreTec5 version 5.0.0 Additional Metrics Relevant CWE: CWE-123 Write-what-where Condition CVSS Version Base Score Base Severity Vector String 3.1 8.8 HIGH CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H View CVE Details Acknowledgments Ritesh Kumar Kalle, Subhojeet Mukherjee, Hishamudeen of the Cybersecurity Research group, Hitachi India R&D Center reported these vulnerabilities to CISA. Notice The information in this document is subject to change without notice and should not be construed as a commitment by Hitachi Energy. Hitachi Energy provides no warranty, express or implied, including warranties of merchantability and fitness for a particular purpose, for the information contained in this document, and assumes no responsibility for any errors that may appear in this document.