Compliance Impact

The vulnerability in the Eppendorf BioFlo 320 involving a hard-coded password for VNC access and unencrypted VNC traffic can lead to unauthorized remote control of the device. This unauthorized access risks compromising sensitive operational data and control, which could impact compliance with standards and regulations such as GDPR and HIPAA that require protection of sensitive data and secure access controls.

Specifically, the lack of encryption and use of hard-coded credentials violate best practices for data security and access management, potentially leading to breaches of confidentiality, integrity, and availability of data. This can result in non-compliance with regulations that mandate secure authentication, encryption, and protection against unauthorized access.

Mitigation steps, including software updates that remove VNC access and recommendations to restrict network exposure and use secure remote access methods, are critical to restoring compliance and reducing risk.

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Executive Summary

CVE-2026-7251 is a critical security vulnerability in the Eppendorf BioFlo 320 bioprocess controller involving its Virtual Network Computing (VNC) remote access feature.

The vulnerability arises because the VNC server uses a hard-coded password, allowing a remote attacker who knows the network address of any BioFlo 320 device with remote access enabled to gain full control of the user interface without authentication.

Additionally, VNC traffic is not encrypted, which increases the risk of interception or unauthorized access.

Eppendorf has addressed this issue by releasing software updates that remove VNC access entirely from the BioFlo 320, and VNC was disabled by default in shipped systems.

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Impact Analysis

If exploited, this vulnerability allows a remote attacker to gain full control over the BioFlo 320's user interface and all control panel features.

This means the attacker could manipulate device settings, disrupt bioprocess operations, or cause operational failures.

Because VNC traffic is unencrypted, attackers could also intercept sensitive information or credentials.

The vulnerability has a high severity score (CVSS v3.1 base score of 9.8), indicating a critical impact with no required privileges or user interaction for exploitation.

Mitigation involves applying the software update that removes VNC access, verifying VNC is disabled, restricting VNC settings to authorized roles, and minimizing network exposure.

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Detection Guidance

This vulnerability involves the VNC server on the Eppendorf BioFlo 320 using a hard-coded password and unencrypted traffic. Detection can focus on identifying active VNC services on the network address of BioFlo 320 devices.

You can scan your network for open VNC ports (default port 5900) on devices suspected to be BioFlo 320 models. For example, using nmap:

• nmap -p 5900 <target-ip>

If the port is open, attempt to connect with a VNC client to check if the hard-coded password grants access. Additionally, verify if VNC access is enabled on the device by checking device settings or configuration interfaces.

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Mitigation Strategies

Immediate mitigation steps include verifying that VNC access is disabled on the BioFlo 320 device, as it is disabled by default in shipped systems.

Restrict VNC settings to Admin and Supervisor roles if VNC must be used temporarily.

Apply the software update version 05.00 for the BioFlo 320, which permanently removes VNC access and addresses the vulnerability.

Additionally, minimize network exposure of the control system by isolating it behind firewalls and using secure remote access methods such as VPNs.

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