Vulnerability Description
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.
Related Weaknesses (CWE)
References
FAQ
What is CVE-2026-9653?
CVE-2026-9653 is a documented vulnerability. 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 expl...
How severe is CVE-2026-9653?
CVSS scoring is not yet available for CVE-2026-9653. Check NVD for updates.
Is there a patch for CVE-2026-9653?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.