CVE-2026-9653 — 1756-EN2, 1756-EN3, and 1756-ENBT - Denial of Service via CIP Connection ID

CVE-2026-9653

1756-EN2, 1756-EN3, and 1756-ENBT - Denial of Service via CIP Connection ID PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / product	Versions
Rockwell Automation / 1756-EN2, 1756-EN3	affected 12.001 and before
Rockwell Automation / 1756-ENBT	affected 6.006

CWE

CWE-354

References

https://www.rockwellautomation.com/en-us/trust-center/security-advisories/advisory.SD1780.html

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.