CVE-2025-7386: Hitachi Storage Navigator Info Disclosure

CVE-2025-7386 Overview

CVE-2025-7386 is an information exposure vulnerability in Hitachi Storage Navigator, the management interface for Hitachi Virtual Storage Platform (VSP) enterprise storage systems. The flaw allows an authenticated attacker with high privileges to access sensitive credential information over the network. The issue is tracked under CWE-522: Insufficiently Protected Credentials.

The vulnerability affects multiple generations of Hitachi Virtual Storage Platform products, including the VSP 5000 series, VSP G1000/G1500/F1500, and VX7/VX8 platforms. Successful exploitation impacts confidentiality across security scope boundaries, exposing credentials that could enable further compromise of storage infrastructure.

Critical Impact
Authenticated attackers can extract sensitive credential information from Hitachi Storage Navigator, potentially enabling lateral movement across enterprise storage infrastructure managing petabytes of critical data.

Affected Products

Hitachi Virtual Storage Platform 5100, 5200, 5500, 5600, 5100H, 5200H, 5500H, 5600H, VX8 before DKCMAIN Ver. 90-09-24-00/00 / SVP Ver. 90-09-24/00
Hitachi Virtual Storage Platform 5100, 5200, 5500, 5600, 5100H, 5200H, 5500H, 5600H, VX8 before DKCMAIN Ver. 90-08-86-00/00 / SVP Ver. 90-08-86/00
Hitachi Virtual Storage Platform G1000, G1500, F1500, VX7 before DKCMAIN Ver. 80-06-96-00/00 / SVP Ver. 80-06-91/00

Discovery Timeline

2026-06-29 - CVE-2025-7386 published to NVD
2026-06-29 - Last updated in NVD database

Technical Details for CVE-2025-7386

Vulnerability Analysis

CVE-2025-7386 is an information exposure vulnerability in Hitachi Storage Navigator, the web-based management application used to configure and monitor Hitachi Virtual Storage Platform arrays. The flaw is classified under CWE-522: Insufficiently Protected Credentials, indicating that credential material handled by the application is not adequately safeguarded during storage or transit.

The vulnerability requires an authenticated attacker with elevated privileges to reach the vulnerable code path. Once exploited, the attacker gains access to sensitive information that crosses a security boundary, affecting components beyond the initially compromised scope. The vulnerability does not impact system integrity or availability directly, but the exposed credentials can enable follow-on attacks.

Root Cause

The root cause lies in how Hitachi Storage Navigator stores or transmits credential data within the Service Processor (SVP) and DKCMAIN firmware components. Insufficient protection mechanisms allow authorized users to retrieve credentials that should be isolated from their privilege level. Hitachi addressed the flaw by revising credential handling in DKCMAIN and SVP firmware.

Attack Vector

Exploitation requires network access to the Storage Navigator management interface and valid high-privileged credentials. An attacker who has compromised a storage administrator account, or an insider with legitimate access, can query the vulnerable interface to extract credentials belonging to other components or accounts. Because storage arrays typically integrate with backup systems, hypervisors, and directory services, harvested credentials can facilitate lateral movement into adjacent infrastructure.

No public proof-of-concept or exploit code is currently available, and the vulnerability is not listed in the CISA Known Exploited Vulnerabilities catalog. Technical details are documented in the Hitachi Security Information 2026 advisory.

Detection Methods for CVE-2025-7386

Indicators of Compromise

Unexpected authentication events to Storage Navigator from administrative accounts outside normal operational windows.
Access to credential-related management endpoints on the SVP not correlated to scheduled maintenance or documented change tickets.
Subsequent use of service or integration account credentials from hosts that do not typically initiate storage management sessions.

Detection Strategies

Enable and forward Storage Navigator and SVP audit logs to a centralized SIEM for correlation with identity and endpoint telemetry.
Baseline normal administrator access patterns to Storage Navigator and alert on anomalous session activity or credential retrieval operations.
Verify running DKCMAIN and SVP firmware versions against the fixed versions listed in the Hitachi advisory to identify exposed systems.

Monitoring Recommendations

Monitor privileged storage administrator accounts for logins from unusual sources, times, or geographies.
Track outbound authentication attempts using service accounts that integrate the storage platform with backup, virtualization, or directory infrastructure.
Alert on configuration exports or bulk read operations against Storage Navigator management APIs.

How to Mitigate CVE-2025-7386

Immediate Actions Required

Inventory all Hitachi Virtual Storage Platform systems and identify DKCMAIN and SVP firmware versions currently deployed.
Apply the fixed firmware versions published by Hitachi as soon as scheduled maintenance permits.
Rotate credentials for accounts managed through or integrated with Storage Navigator after patching, assuming potential exposure.
Restrict network access to Storage Navigator and the SVP to a dedicated management network protected by jump hosts and multi-factor authentication.

Patch Information

Hitachi has released fixed firmware for the affected platforms. For VSP 5000 series and VX8, upgrade to DKCMAIN Ver. 90-09-24-00/00 with SVP Ver. 90-09-24/00, or DKCMAIN Ver. 90-08-86-00/00 with SVP Ver. 90-08-86/00. For VSP G1000, G1500, F1500, and VX7, upgrade to DKCMAIN Ver. 80-06-96-00/00 with SVP Ver. 80-06-91/00. Full details are available in the Hitachi Security Information 2026 advisory.

Workarounds

Limit Storage Navigator access to a hardened management VLAN reachable only from authorized administrator workstations.
Enforce least privilege for storage administrator roles and remove standing high-privilege access where feasible.
Require multi-factor authentication for all administrative access to the SVP and Storage Navigator interfaces.
Continuously monitor privileged account activity on storage management planes until patches are deployed.

bash

# Configuration example: restrict management network access to Storage Navigator SVP
# Replace with your environment's specific addresses and interfaces
iptables -A INPUT -p tcp -s 10.10.20.0/24 --dport 443 -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -j DROP