CVE-2012-6440

What it is

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

At a glance

Exploitability

Can be exploited over the network without logging in. Limited direct impact.

Exploit odds

9.2% chance of exploitation in the next 30 days (EPSS).

Fix

No patch or advisory is linked yet. Look at mitigations or restrict exposure.

Timeline

1. 2013-01-24 21:55 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-16 23:48 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 9.2% in the next 30 days (EPSS).
• Severity: 4.8 MEDIUM (CVSS).
• Fix: none linked yet, which raises it.

Details

Published

2013-01-24 21:55 UTC

Last modified

2026-06-16 23:48 UTC

Exploit probability

9.2% · EPSS, next 30 days

Weakness

CWE-287 · Improper authentication

Record status

Modified

Affected

• Rockwellautomation Controllogix Controllers ≤ 20
• Rockwellautomation Guardlogix Controllers ≤ 20
• Rockwellautomation Micrologix ≤ 1100
• Rockwellautomation Micrologix ≤ 1400
• Rockwellautomation Softlogix Controllers ≤ 19
• Rockwellautomation 1756-enbt
• Rockwellautomation 1756-eweb
• Rockwellautomation 1768-enbt

Attack profile CVSS 3.1 · 4.8

Attack vector

Network

Complexity

High

Privileges needed

None

User interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

None

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2012-6440.md and follow it. Check whether this project is affected by CVE-2012-6440. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

Copy as ticket · More options · Status badge