CVE-2026-84235: Vulnerability in Rockwell Automation 1756-ENBT Module
Description
A denial-of-service security issue exists in the affected product. The security issue stems from a crafted CIP packet being sent crashing the module. The device requires a restart to recover.
CVSS v4.0
Score 8.7high
Affected software
Rockwell Automation
1756-ENBT Module
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability in the Rockwell Automation 1756-ENBT Module allows an unauthenticated attacker to send a crafted CIP packet that triggers a denial-of-service condition by crashing the module. The device becomes non-operational until manually restarted. The CVSS 4.0 base score is 8.7, reflecting network attack vector, low complexity, no privileges or user interaction required, and high impact on availability. No vendor advisory or patch information is currently available.
Potential Impact
Successful exploitation results in a denial-of-service condition that crashes the 1756-ENBT Module, causing loss of device availability until a manual restart is performed. This can disrupt industrial control processes relying on the module.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, consider limiting network exposure of the affected module and monitoring for unusual CIP traffic patterns to reduce risk.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Rockwell
- Date Reserved
- 2026-09-01T12:56:28.970Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6a96d1a2acd9273b49bee502
Added to database: 09/01/2026, 13:22:42 UTC
Last enriched: 09/07/2026, 14:43:16 UTC
Last updated: 10/15/2026, 18:48:24 UTC
Views: 93
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