CVE-2012-6440

CVE-2012-6440: Rockwell Automation ControlLogix PLC Improper Input Validation

Vendor Rockwell Automation
Product 1756-ENBT, 1756-EWEB, 1768-ENBT, 1768-EWEB communication modules
Weakness CWE-287 · Improper authentication
Published January 24, 2013
Last update June 3, 2026

CVSS base score

What the vulnerability does

01Description

The Web server password authentication mechanism used by the products is vulnerable to a MitM and Replay attack. Successful exploitation of this vulnerability will allow unauthorized access of the product’s Web server to view and alter product configuration and diagnostics information. Rockwell Automation EtherNet/IP products; 1756-ENBT, 1756-EWEB, 1768-ENBT, and 1768-EWEB communication modules; CompactLogix L32E and L35E controllers; 1788-ENBT FLEXLogix adapter; 1794-AENTR FLEX I/O EtherNet/IP adapter; ControlLogix 18 and earlier; CompactLogix 18 and earlier; GuardLogix 18 and earlier; SoftLogix 18 and earlier; CompactLogix controllers 19 and earlier; SoftLogix controllers 19 and earlier; ControlLogix controllers 20 and earlier; GuardLogix controllers 20 and earlier; and MicroLogix 1100 and 1400

Key dates

02Disclosure timeline

January 24, 2013 CVE published
June 3, 2026 Record updated