What CISOs need to know: Eppendorf BioFlo 320
A dod_stig signal from CISA Cybersecurity Advisories - and what compliance teams should do this week.
Published 2026-05-27
# What CISOs need to know: Eppendorf BioFlo 320
What happened
<p><a href="https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsma-26-146-01.json"><strong>View CSAF</strong></a></p> <h2>Summary</h2> <p><strong>Successful exploitation of this vulnerability could allow an attacker to gain full access to functionality and data with the bioreactor.</strong></p> <p>The following versions of Eppendorf BioFlo 320 are affected:</p> <ul> <li>BioFlo 320 Bioreactor vers:all/</li> </ul> <div class="csaf-table"> <table class="tablesaw tablesaw-stack"> <thead> <tr> <th>CVSS</th> <th>Vendor</th> <th>Equipment</th> <th>Vulnerabilities</th> </tr> </thead> <tbody> <tr> <td>v3 9.8</td> <td>Eppendorf</td> <td>Eppendorf BioFlo 320</td> <td>Use of Hard-coded Password</td> </tr> </tbody> </table> </div> <h3>Background</h3> <ul> <li><strong>Critical Infrastructure Sectors: </strong>Healthcare and Public Health</li> <li><strong>Countries/Areas Deployed: </strong>Worldwide</li> <li><strong>Company Headquarters Location: </strong>Germany</li> </ul> <hr /> <h2>Vulnerabilities</h2> <div class="csaf-accordion"> <p><a class="csaf-accordion-toggle-all" href="https://www.cisa.gov/">Expand All +</a></p> <div class="csaf-accordion-item"> <h3><a class="csaf-accordion-toggle" href="https://www.cisa.gov/">CVE-2026-7251</a></h3> <div class="csaf-accordion-content"> <p>The affected product is vulnerable to due to VNC server using a hard-coded password. If a remote attacker knows the network address of any BioFlo 320 model with remote access enabled, they can gain full control of the user interface by using this password. Once connected, the attacker would have full access to all control panel features for the BioFlo 320. VNC traffic is not encrypted.</p> <p><a href="https://www.cve.org/CVERecord?id=CVE-2026-7251">View CVE Details</a></p> <hr /> <h4>Affected Products</h4> <h5>Eppendorf BioFlo 320</h5> <div class="ics-vendor-version-status"> <div class="ics-vendor"><strong>Vendor:</strong><br />Eppendorf</div> <div class="ics-version"><strong>Product Version:</strong><br />Eppendorf BioFlo 320 Bioreactor: vers:all/</div> <div class="ics-status"><strong>Product Status:</strong><br />known_affected</div> </div> <div class="ics-remediations"> <h6>Remediations</h6> <p><strong>Mitigation</strong><br />Eppendorf has released a software update that permanently removes VNC access from the controller. Users should download and apply this update from: https://www.eppendorf.com/software-downloads.<br /><a href="https://www.eppendorf.com/software-downloads">https://www.eppendorf.com/software-downloads</a></p> <p><strong>Mitigation</strong><br />All affected BioFlo 320 systems always shipped with Virtual Network Computing (VNC) disabled by default, and VNC can only be enabled locally at the tower. Eppendorf has removed VNC configuration information from all current documentation, so it no longer appears in BioFlo 320 Operating Manuals.</p> <p><strong>Mitigation</strong><br />Eppendorf recommends user do the following:<br />Verify that VNC is disabled on the controller<br />Enable security so that only Admin and Supervisor roles can change VNC settings<br />Install Version 5.0 Software as soon as possible</p> </div> <p><strong>Relevant CWE:</strong> <a href="https://cwe.mitre.org/data/definitions/259.html">CWE-259 Use of Hard-coded Password</a></p> <hr /> <h4>Metrics</h4> <div class="csaf-table csaf-metrics-table"> <table class="tablesaw tablesaw-stack"> <thead> <tr> <th>CVSS Version</th> <th>Base Score</th> <th>Base Severity</th> <th>Vector String</th> </tr> </thead> <tbody> <tr> <td>3.1</td> <td>9.8</td> <td>CRITICAL</td> <td><a href="https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H">CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H</a></td> </tr> </tbody> </table> </div> </div> </div> </div> <hr /> <h2>Acknowledgments</h2> <ul> <li>BIO-ISAC reported this vulnerability to CISA</li> </ul> <hr /> <h2>Legal Notice and Terms of Use</h2> <p>This product is provided subject to this Notification (https://www.cisa.gov/notification) and this Privacy & Use policy (https://www.cisa.gov/privacy-policy).</p> <hr /> <h2>Recommended Practices</h2> <p>CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability.</p> <p>Minimize network exposure for all control system devices and/or systems, ensuring they are not accessible from the internet.</p> <p>Locate control system networks and remote devices behind firewalls and isolating them from business networks.</p> <p>When remote access is required, use more secure methods, such as Virtual Private Networks (VPNs), recognizing VPNs may have vulnerabilities and should be updated to the most current version available. Also recognize VPN is only as secure as the connected devices.</p> <p>CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.</p> <p>CISA also provides a section for control systems security recommended practices on the ICS webpage on cisa.gov/ics. Several CISA products detailing cyber defense best practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies.</p> <p>CISA encourages organizations to implement recommended cybersecurity strategies for proactive defense of ICS assets.</p> <p>Additional mitigation guidance and recommended practices are publicly available on the ICS webpage at cisa.gov/ics in the technical information paper, ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation Strategies.</p> <p>Organizations observing suspected malicious activity should follow established internal procedures and report findings to CISA for tracking and correlation against other incidents.</p> <p>CISA also recommends users take the following measures to protect themselves from social engineering attacks:</p> <p>Do not click web links or open attachments in unsolicited email messages.</p> <p>Refer to Recognizing and Avoiding Email Scams for more information on avoiding email scams.</p> <p>Refer to Avoiding Social Engineering and Phishing Attacks for more information on social engineering attacks.</p> <p>No known public exploitation specifically targeting this vulnerability has been reported to CISA at this time.</p> <hr /> <h2>Revision History</h2> <ul> <li><strong>Initial Release Date: </strong>2026-05-26</li> </ul> <table class="tablesaw tablesaw-stack"> <thead> <tr> <th>Date</th> <th>Revision</th> <th>Summary</th> </tr> </thead> <tbody> <tr> <td>2026-05-26</td> <td>1</td> <td>Initial Publication</td> </tr> </tbody> </table> <hr /> <h2>Legal Notice and Terms of Use</h2>
Source: CISA Cybersecurity Advisories
Why it matters
This signal sits squarely in the DoD STIG Readiness + ACAS / SCAP audit alignment territory. CISOs and compliance leads at mid-market EU/US organisations should map it to their control set within the next 7-14 days.
What to do this week
1. Read the source advisory in full and identify whether your environment is in scope. 2. Check existing controls against the requirement / vulnerability. 3. Document evidence of remediation or non-applicability - auditors will ask.
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