CVE-2026-9653 (GCVE-0-2026-9653)

Vulnerability from cvelistv5 – Published: 2026-07-14 15:00 – Updated: 2026-07-14 15:25
VLAI
Title
1756-EN2, 1756-EN3, and 1756-ENBT - Denial of Service via CIP Connection ID
Summary
A denial-of-service security issue exists across all the 1756-EN2, EN3, and ENBT communication module due to improper validation of CIP Implicit Connection packets. An attacker on the network can exploit this by sending crafted packets to continuously disrupt device connections, though device connections will recover immediately after.
Severity
8.7 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-14 15:25 UTC
CWE
  • CWE-354 - Improper validation of integrity check value
Assigner
Rockwell CNA under the icscert root
CNA scorecard C 74/100 over 47 records in the last 180 days details
References
Impacted products
Show details on NVD website
To clipboard 

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