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
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
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. In no event shall Hitachi Energy or any of its suppliers be liable for direct, indirect, special, incidental or consequential damages of any nature or kind arising from the use of this document, or from the use of any hardware or software described in this document, even if Hitachi Energy or its suppliers have been advised of the possibility of such damages. This document and parts hereof must not be reproduced or copied without written permission from Hitachi Energy and the contents hereof must not be imparted to a third party nor used for any unauthorized purpose. All rights to registrations and trademarks reside with their respective owners.
Support
For additional information and support please contact your product provider or Hitachi Energy service organization. For contact information, see https://www.hitachienergy.com/contact-us/ for Hitachi Energy contact-centers.
General Mitigation
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