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7.1

EN4TR Device Crash from Malformed Messages

CVE-2025-8008 · published 1 year ago
Summary

A security issue affects EN4TR devices when they are in protected mode. If the device receives a specially designed message during a Forward Close operation, it may crash. This can be prevented by updating the device to the latest firmware.

What to do
  • Update rockwellautomation 1756-en2tr_series_a_firmware to version 7.001 or later.
  • Update rockwellautomation 1756-en2tr_series_b_firmware to version 7.001 or later.
  • Update rockwellautomation 1756-en2tr_series_c_firmware to version 7.001 or later.
  • Update rockwellautomation 1756-en4tr_firmware to version 7.001 or later.
  • Update rockwellautomation 1756-en4trxt_firmware to version 7.001 or later.
Affected software
VendorProductAffected versions
rockwellautomation 1756-en2tr_series_a_firmware < 7.001
cpe:2.3:o:rockwellautomation:1756-en2tr_series_a_firmware:*:*:*:*:*:*:*:*
rockwellautomation 1756-en2tr_series_b_firmware < 7.001
cpe:2.3:o:rockwellautomation:1756-en2tr_series_b_firmware:*:*:*:*:*:*:*:*
rockwellautomation 1756-en2tr_series_c_firmware < 7.001
cpe:2.3:o:rockwellautomation:1756-en2tr_series_c_firmware:*:*:*:*:*:*:*:*
rockwellautomation 1756-en4tr_firmware < 7.001
cpe:2.3:o:rockwellautomation:1756-en4tr_firmware:*:*:*:*:*:*:*:*
rockwellautomation 1756-en4trxt_firmware < 7.001
cpe:2.3:o:rockwellautomation:1756-en4trxt_firmware:*:*:*:*:*:*:*:*
Original advisory text
A security issue exists in the protected mode of EN4TR devices, where sending specifically crafted messages during a Forward Close operation can cause the device to crash.
A security issue exists in the protected mode of EN4TR devices, where sending specifically crafted messages during a Forward Close operation can cause the device to crash.
References
Fix within
Internet-facing 60 days
Internal At next upgrade
  • Not known to be exploited
  • Needs hands-on effort to exploit
  • Gives an attacker partial control
Severity
7.1 High
Exploitation
<1% chance of attack within 30 days
Type
CWE-755Improper Handling of Exceptional Conditions
Timeline
Published9 Sep 2025
Updated4 Nov 2026
First seen7 Mar 2026
Sources
CVE-2025-8008 · NVD
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