CVE-2012-6437

What it is

The device does not properly authenticate users and the potential exists for a remote user to upload a new firmware image to the Ethernet card, whether it is a corrupt or legitimate firmware image. Successful exploitation of this vulnerability could cause loss of availability, integrity, and confidentiality and a disruption in communications with other connected devices. 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. High risk of data exposure, data tampering, service disruption.

Exploit odds

10.5% chance of exploitation in the next 30 days (EPSS). Higher than most.

Fix

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

Timeline

1. 2012-12-26 00:00 UTC ReservedThe CVE id was reserved by its CNA
2. 2013-01-24 21:55 UTC PublishedDisclosed publicly on CVE.org and NVD
3. 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: 10.5% in the next 30 days (EPSS).
• Severity: 9.8 CRITICAL (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

10.5% · 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 · 9.8

Attack vector

Network

Complexity

Low

Privileges needed

None

User interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

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-2012-6437.md and follow it. Check whether this project is affected by CVE-2012-6437. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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