CVE-2025-64122: Nuvation Energy MSC Auth Bypass Flaw

CVE-2025-64122 Overview

An Insufficiently Protected Credentials vulnerability has been identified in the Nuvation Energy Multi-Stack Controller (MSC), a critical component used in energy storage and management systems. This vulnerability (CWE-522) allows attackers with local access to exploit weakly protected credentials, potentially enabling signature spoofing through key theft. The flaw affects the authentication and authorization mechanisms of the MSC, putting industrial control systems at risk of unauthorized access and manipulation.

Critical Impact

Attackers exploiting this vulnerability could steal cryptographic keys to forge valid signatures, enabling unauthorized commands to energy management infrastructure and potentially disrupting power grid operations.

Affected Products

• Nuvation Energy Multi-Stack Controller (MSC) through version 2.5.1

Discovery Timeline

• 2026-01-02 - CVE CVE-2025-64122 published to NVD
• 2026-01-08 - Last updated in NVD database

Technical Details for CVE-2025-64122

Vulnerability Analysis

This vulnerability stems from inadequate protection of sensitive credential material within the Nuvation Energy Multi-Stack Controller. The MSC fails to properly secure cryptographic keys and authentication credentials, making them accessible to attackers who gain local access to the system. Once an attacker obtains these credentials, they can create forged signatures that appear legitimate to the system, bypassing authentication controls entirely.

The impact extends beyond the immediate device, as compromised credentials could facilitate lateral movement within connected energy infrastructure. The vulnerability requires local access to exploit, which provides some mitigation, but physical access to industrial control systems is not uncommon in energy sector deployments.

Root Cause

The root cause of CVE-2025-64122 is the insufficient protection of credential storage within the Multi-Stack Controller. The system stores cryptographic keys and authentication materials without adequate encryption, access controls, or secure enclave protection. This allows an attacker with local access to read, extract, or copy these sensitive materials. Common manifestations of CWE-522 include storing credentials in plaintext configuration files, using weak encryption for key storage, or failing to implement proper file system permissions on credential stores.

Attack Vector

The attack requires local access to the Nuvation Energy MSC device. An attacker would need to gain physical or network-level access to the controller's file system or memory. Once access is obtained, the attacker can locate and extract the insufficiently protected credentials. These stolen keys can then be used to:

1. Create forged digital signatures that the system accepts as valid
2. Authenticate as legitimate system components or administrators
3. Issue unauthorized commands to connected energy management systems
4. Potentially pivot to other connected infrastructure components

The vulnerability mechanism involves accessing credential storage locations where cryptographic keys are stored without adequate protection. The attacker extracts these keys and uses them to generate valid signatures, effectively impersonating trusted entities within the system. For detailed technical information, refer to the Dragos Security Advisory.

Detection Methods for CVE-2025-64122

Indicators of Compromise

• Unexpected file access attempts on credential storage directories or configuration files containing key material
• Anomalous authentication patterns using valid credentials from unusual sources or at unusual times
• Signature verification events from unexpected system components or network locations
• File integrity monitoring alerts on cryptographic key files or certificate stores

Detection Strategies

• Implement file integrity monitoring on all credential storage locations within the MSC
• Deploy behavioral analytics to detect unusual access patterns to sensitive configuration files
• Monitor authentication logs for signature-based authentication from unexpected sources
• Enable comprehensive logging of all administrative access to the controller

Monitoring Recommendations

• Configure SIEM rules to alert on multiple failed authentication attempts followed by successful signature-based auth
• Establish baseline behavior for credential file access and alert on deviations
• Monitor network traffic for unusual command patterns that may indicate forged authentication
• Implement hardware security module (HSM) integration monitoring where available

How to Mitigate CVE-2025-64122

Immediate Actions Required

• Review and audit all credential storage locations on affected Multi-Stack Controller devices
• Implement additional access controls and monitoring on systems running MSC version 2.5.1 or earlier
• Restrict physical and network access to MSC devices to authorized personnel only
• Rotate all cryptographic keys and credentials as a precautionary measure

Patch Information

Organizations should monitor Nuvation Energy communications for security updates addressing this vulnerability. Until a patch is available, implement the recommended workarounds and enhanced monitoring. Review the Dragos Security Advisory for the latest remediation guidance.

Workarounds

• Implement network segmentation to isolate MSC devices from general network access
• Enable enhanced file system permissions and access controls on credential storage locations
• Deploy additional authentication factors where supported by the infrastructure
• Consider implementing hardware security modules (HSM) for credential protection
• Establish comprehensive logging and monitoring of all access to affected systems

To enhance credential protection on the affected systems, implement strict file permissions and access controls:

# Restrict access to credential directories
chmod 600 /path/to/msc/credentials/*
chown root:root /path/to/msc/credentials/*

# Enable audit logging for credential file access
auditctl -w /path/to/msc/credentials/ -p rwa -k msc_credential_access

# Verify current permissions
ls -la /path/to/msc/credentials/