CVE-2026-9653
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.
Scoring
- Severity
- HIGH
- CVSS base score
- 8.7
- CVSS vector
- 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
- EPSS probability
- 0.23%
- CWE
- CWE-354
- Published
- 2026-07-14
- Last modified
- 2026-07-14
Affected products
- Rockwell Automation 1756-EN2, 1756-EN3
- Rockwell Automation 1756-ENBT
Weakness type
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