CVE-2026-9653 — 1756-EN2, 1756-EN3, and 1756-ENBT - Denial of Service via CIP Connection ID
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 …
Published: 2026-07-14 · CVSS: 8.7 · CVSS 4.0
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7