Hitachi Energy is aware of open-source software vulnerabilities that affect REB500 product versions listed in this document. These vulnerabilities can be exploited to carry out Denial of Service (DoS) attack on the product. Please refer to the Recommended Immediate Actions for information about the mitigation/remediation. The following versions of Hitachi Energy REB500 are affected: REB500 vers:REB500/ CVSS Vendor Equipment v3 6.5 Hitachi Energy REB500 2 Vulnerabilities Uncontrolled Recursion, Allocation of Resources Without Limits or Throttling Background Critical Infrastruc