CVE-2026-0647 PUBLISHED

Rockwell Automation FLEX I/O Dual-port EtherNet/IP Adapters – Multiple Vulnerabilities

Assigner: Rockwell
Reserved: 06.01.2026 Published: 16.06.2026 Updated: 16.06.2026

An improper authentication security issue exists within the 1794-AENTR adapter's embedded web server. The vulnerability allows an unauthenticated attacker to change the device's web interface password by sending a crafted HTTP GET request to a specific endpoint, without any prior authentication being required. If exploited, this could lead to unauthorized access, account takeover, and loss of the device’s embedded web server’s availability.

Metrics

CVSS 4.0

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:H/SC:N/SI:N/SA:N
CVSS Score: 8.8

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	Low	Confidentiality	None
Attack Complexity	Low	Integrity	High	Integrity	None
Attack Requirements	None	Availability	High	Availability	None
Privileges Required	None
User Interaction	None

CVSS 4.0

Product Status

Vendor	Rockwell Automation
Product	FLEX I/O EtherNet/IP Adapters
Versions	Default: unaffected Version 2.012 is affected

References

https://www.rockwellautomation.com/en-us/trust-center/security-advisories/advisory.SD1775.html

Problem Types

CWE-306: Missing Authentication for Critical Function CWE