CVE-2026-10577: 1715-AENTR Auth Bypass Vulnerability

CVE-2026-10577 Overview

CVE-2026-10577 affects the Rockwell Automation 1715-AENTR EtherNet/IP Adapter. The device exposes a network-accessible debug port that lacks proper privilege enforcement. Unauthenticated remote attackers can invoke intrusive command-line interface (CLI) commands over the network. Successful exploitation allows an attacker to read or delete files, stop tasks, modify memory, and change I/O states on the adapter.

The vulnerability is categorized as Missing Authentication for Critical Function [CWE-306]. It received the maximum CVSS v4.0 base score of 10.0, reflecting network reachability, no required privileges, and full compromise of confidentiality, integrity, and availability across both the vulnerable component and connected subsystems.

Critical Impact
Unauthenticated network attackers can execute privileged CLI commands on affected 1715-AENTR adapters, enabling manipulation of industrial I/O states and disruption of physical processes.

Affected Products

Rockwell Automation 1715-AENTR EtherNet/IP Adapter
Industrial control system (ICS) deployments using the 1715 redundant I/O family
Operational technology (OT) networks exposing the adapter's debug port

Discovery Timeline

2026-07-14 - CVE-2026-10577 published to the National Vulnerability Database (NVD)
2026-07-14 - Last updated in NVD database

Technical Details for CVE-2026-10577

Vulnerability Analysis

The 1715-AENTR adapter exposes a debug interface reachable over the network. The interface accepts CLI commands that perform sensitive operations on the device but does not require authentication or enforce role-based privilege checks before executing them.

An attacker with network access to the adapter can issue commands to read arbitrary files, delete stored configuration, halt running tasks, write to device memory, and toggle I/O channel states. These operations directly affect the physical process the controller supervises, extending impact beyond the device itself to the machinery and safety systems it drives.

The issue is characteristic of debug or diagnostic interfaces left enabled in production firmware without gating. Because EtherNet/IP adapters are typically flat on OT segments, any host that reaches the adapter can invoke the CLI without credentials.

Root Cause

The root cause is Missing Authentication for Critical Function [CWE-306]. The debug port accepts privileged CLI operations without validating the identity or authorization of the requester. There is no session establishment, credential check, or command-level access control on the intrusive command set.

Attack Vector

Exploitation requires only network access to the adapter's debug port. No user interaction, credentials, or prior compromise are needed. An attacker on the same routable segment, or one who has pivoted from an IT network into the OT environment, can connect directly and issue commands. Refer to the Rockwell Automation Security Advisory SD1785 for the vendor's technical description.

Detection Methods for CVE-2026-10577

Indicators of Compromise

Unexpected TCP connections to the 1715-AENTR debug port from hosts outside the engineering workstation range
Unplanned changes to I/O channel states, task status, or memory contents on the adapter
Missing or truncated configuration and log files on the device after remote sessions
Diagnostic CLI sessions originating from IT-segment or internet-adjacent hosts

Detection Strategies

Baseline legitimate management traffic to the 1715-AENTR and alert on any deviation in source address or port
Monitor EtherNet/IP and adjacent TCP flows to industrial adapters using an ICS-aware intrusion detection system
Correlate controller task-stop events and I/O state transitions with network session logs to identify unauthorized CLI activity

Monitoring Recommendations

Enable full packet capture on OT aggregation switches serving 1715 chassis for forensic replay
Forward controller diagnostic events and syslog to a centralized SIEM for cross-domain correlation
Alert on any new host initiating sessions to industrial adapter management or debug ports

How to Mitigate CVE-2026-10577

Immediate Actions Required

Restrict network access to the 1715-AENTR adapter to a dedicated management VLAN with explicit allow-lists
Block external and IT-to-OT routing to the adapter's debug port at firewalls and layer-3 boundaries
Inventory affected 1715-AENTR devices and prioritize those exposed beyond the local control cell
Apply vendor firmware updates as soon as they are made available by Rockwell Automation

Patch Information

Consult the Rockwell Automation Security Advisory SD1785 for firmware versions, remediation guidance, and any interim mitigations published by the vendor. Coordinate deployment with plant maintenance windows given the adapter's role in live I/O.

Workarounds

Place the adapter behind an ICS-aware firewall and permit only engineering workstation IPs to reach management services
Disable or firewall the debug port at the network layer where operationally feasible
Segment OT networks per ISA/IEC 62443 zones and conduits to eliminate cross-segment reachability
Require jump-host access with multi-factor authentication for any engineering session touching the 1715 chassis

bash

# Example firewall rule to restrict adapter access to engineering workstation
iptables -A FORWARD -s 10.10.20.5/32 -d 10.20.30.10/32 -j ACCEPT
iptables -A FORWARD -d 10.20.30.10/32 -j DROP