Key points
- CVE-2026-108335 affects Hitachi Vantara Remote Ops Agent versions prior to 2.0.
- Missing rate limiting on password reset codes enables brute-force account takeover.
- Exploitation requires enabled reset functionality and configured email settings.
Malicious actors can hijack administrator accounts in Hitachi Vantara Remote Ops Agent by exploiting a lack of rate limiting on password reset codes. The National Vulnerability Database rates this flaw as critical, assigning it CVE-2026-108335 and a CVSS score of 9.1. Attackers targeting this vulnerability can systematically guess the reset codes required to change passwords, effectively bypassing the initial security challenge.
This exploit works specifically when the password reset feature is active and the system has email services configured. According to the NVD record, an attacker can use a brute-force method to solve the password reset challenge because the application does not limit the number of attempts. This allows continuous guessing of the verification code until a match is found.
What we know
The vulnerability is associated with CWE-640. In this specific implementation, the failure to restrict login or reset attempts creates an open door for automated scripts. Once an attacker guesses the correct code, they can reset the password and gain full administrative access to the application. This access allows them to configure the service or request log collection, though the NVD notes that device credentials and customer data remain inaccessible through this specific path.
Defender's checklist
- Verify if Hitachi Vantara Remote Ops Agent is installed and check the version number.
- Confirm if the password reset functionality is currently enabled on the system.
- Check if email services are configured for the agent to handle reset requests.
- Monitor logs for multiple failed password reset attempts from single IP addresses.
What analysts watch for
Security teams usually monitor authentication logs for spikes in failed reset attempts, which signal brute-force activity. Analysts examine firewall rules to see if external IPs are accessing reset endpoints directly. Persistence in these attacks often involves automated scripts rotating IPs or using distributed networks. Investigators look for successful resets followed immediately by configuration changes or log downloads, indicating compromise. Teams should verify that account lockout policies are active to mitigate such credential-guessing campaigns.
Background: Rate limiting
Rate limiting restricts request frequency to protect resources and deter simple attacks. It reduces server load and slows credential stuffing. It does not stop distributed attacks or application logic flaws. Combine it with behavioral analysis for defense against malicious bot traffic and account takeover attempts.
Read the full guide: Rate Limiting: Benefits, Limits, and When to Deploy It
What to do and how to stay safe: Hitachi Vantara
- Disable the password reset feature if it is not strictly required for your operations.
- Implement network-level rate limiting on endpoints handling password reset requests.
- Monitor administrative logs for unusual configuration changes or log collection requests.
- Ensure email configurations are secured to prevent interception of reset codes.
Step-by-step guide: Security Advisories: Small Business Patching Strategy
General security guidance from the Malware Chronicle newsroom. It is not confirmed advice from the organisations named in this story.
Frequently asked questions
Which versions of Hitachi Vantara Remote Ops Agent are affected by CVE-2026-108335?
All versions of Hitachi Vantara Remote Ops Agent up to and including 2.0 are affected.
Can attackers access customer data or device credentials through this flaw?
No, the NVD states that device credentials and customer data cannot be accessed using this vulnerability.
What specific conditions must be met for this brute-force attack to work?
The password reset functionality must be enabled and email services must be configured for the attack to succeed.
