Summary
The display unit of the Endress+Hauser MCS200HW is affected by a sudo chroot vulnerability.
Details
Impact
If exploited, this vulnerability could potentially allow an unauthenticated attacker to compromise the availability, integrity, and confidentiality of the Endress+Hauser MCS200HW.
Mitigation
As a temporary mitigation measure, both system and network access to the affected functionality should be strictly restricted. Access should be limited to authorized personnel only, and exposure to external or untrusted networks should be minimized or fully blocked until an update of the display firmware has been completed.
Remediation
Endress+Hauser has released updated firmware versions that address this vulnerability.
The display unit's firmware versions below 4.3.4 are affected. To address the vulnerability,
customers are strongly recommended to update the display unit of their devices to firmware version
4.3.4.
Endress+Hauser will include this firmware version in the MCS200HW products starting with version
1.11.5.6R.
Alternatively, customers can contact Endress+Hauser directly to obtain the updated display firmware,
or download the original firmware - including update instructions - from the Phoenix Contact website
referenced below.
Customers are strongly advised to upgrade to the latest fixed version. For assistance, please contact your local Endress+Hauser service center.
Vulnerabilities 1
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Critical 9.3
Sudo before 1.9.17p1 allows local users to obtain root access because /etc/nsswitch.conf from a user-controlled directo…
KEV Sep 29, 2025
Revision history
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#1.0.0
Initial version
References
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Endress+Hauser
https://www.endress.com
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CERT@VDE Security Advisories for Endress+Hauser
https://certvde.com/en/advisories/vendor/endress+hauser
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VDE-2026-032: Endress+Hauser: sudo vulnerability affects Endress+Hauser MCS200HW - HTML
https://certvde.com/en/advisories/VDE-2026-032
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Standalone display firmware, update procedure and further details
https://www.phoenixcontact.com/de-de/produkte/touch-panel-wp-6121-wxps-1290802