CVE-2026-9653
1756-EN2, 1756-EN3, and 1756-ENBT - Denial of Service via CIP Connection ID
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-354 |
| Vendor | rockwell automation |
| Product | 1756-en2, 1756-en3 |
| Published | Jul 14, 2026 |
| Last Updated | Jul 14, 2026 |
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Affected Versions
Rockwell Automation / 1756-EN2, 1756-EN3
12.001 and before
Rockwell Automation / 1756-ENBT
6.006