CVE-2012-6437

Name: CVE-2012-6437
Creator: NVD / NIST
Published: 2013-01-24T21:55:01.523+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 9.58%

Last modified Jun 16, 2026

CVE-2012-6437 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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. EPSS estimates a 9.58% chance of exploitation in the next 30 days.

Description

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

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

9.58%

94.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Rockwellautomation	Controllogix Controllers	<= 20
Rockwellautomation	Guardlogix Controllers	<= 20
Rockwellautomation	Micrologix	<= 1100
Rockwellautomation	Micrologix	<= 1400
Rockwellautomation	Softlogix Controllers	<= 19
Rockwellautomation	1756-Enbt	All versions
Rockwellautomation	1756-Eweb	All versions
Rockwellautomation	1768-Enbt	All versions
Rockwellautomation	1768-Eweb	All versions
Rockwellautomation	1794-Aentr Flex I\/O Ethernet\/Ip Adapter	All versions
Rockwellautomation	Compactlogix	<= 18
Rockwellautomation	Compactlogix Controllers	<= 19
Rockwellautomation	Compactlogix L32e Controller	All versions
Rockwellautomation	Compactlogix L35e Controller	All versions
Rockwellautomation	Controllogix	<= 18
Rockwellautomation	Flexlogix 1788-Enbt Adapter	All versions
Rockwellautomation	Guardlogix	<= 18
Rockwellautomation	Softlogix	<= 18

References

Timeline

Published: Jan 24, 2013
Last Modified: Jun 16, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2012-6437?

How severe is CVE-2012-6437?

CVE-2012-6437 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 9.58% probability of exploitation in the next 30 days.

How do I fix CVE-2012-6437?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2012-6437?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST