CVE-2026-9653
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.
Is your site exposed to CVE-2026-9653?
Run a free security scan — no signup, results in seconds.
EPSS — Exploit Prediction
EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.
Weakness Type (CWE)
References
Frequently Asked Questions
What is CVE-2026-9653? +
How do I check if I'm vulnerable to CVE-2026-9653? +
Related Vulnerabilities
secp256k1-node is a Node.js binding for an Optimized C library for EC operations on curve secp256k1. In `elliptic`-based version, `loadUncompressedPublicKey` …
An Improper Validation of Integrity Check Value and Improper Certificate Validation in certain ASUS router models allows a remote man-in-the-middle(MITM) …
A security issue exists within 1769 CompactLogix controllers due to the missing validation of sequence numbers and source IP addresses …
Netskope has identified a potential gap in its agent (Netskope Client) in which a malicious insider can potentially tamper the …
An insufficient validation of an untrusted input vulnerability in Palo Alto Networks Prisma® Browser allows a locally authenticated non-admin user …
In LiteSpeed QUIC (LSQUIC) Library before 4.0.4, DCID validation is mishandled.