CVE-2012-6439
Rockwell Automation ControlLogix PLC Improper Access Control
When an affected product receives a valid CIP message from an unauthorized or unintended source to Port 2222/TCP, Port 2222/UDP, Port 44818/TCP, or Port 44818/UDP that changes the product’s configuration and network parameters, a DoS condition can occur. This situation could cause loss of availability and a disruption of communication 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
Exploit likelihood
What each source reports
CVE List Score used
Rockwell Automation ControlLogix PLC Improper Access Control
When an affected product receives a valid CIP message from an unauthorized or unintended source to Port 2222/TCP, Port 2222/UDP, Port 44818/TCP, or Port 44818/UDP that changes the product’s configuration and network parameters, a DoS condition can occur. This situation could cause loss of availability and a disruption of communication 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
- Record
CVE-2012-6439- CVSS 2.0
- 8.5
AV:N/AC:L/Au:N/C:N/I:P/A:C - Weakness
- CWE-284
- Updated
- 2026-11-02
EUVDEUVD-2012-6292
When an affected product receives a valid CIP message from an unauthorized or unintended source to Port 2222/TCP, Port 2222/UDP, Port 44818/TCP, or Port 44818/UDP that changes the product’s configuration and network parameters, a DoS condition can occur. This situation could cause loss of availability and a disruption of communication 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
- Record
EUVD-2012-6292- CVSS 2.0
- 8.5 High
AV:N/AC:L/Au:N/C:N/I:P/A:C - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-7q92-phh3-9wp8 No score
Rockwell Automation EtherNet/IP products; 1756-ENBT, 1756-EWEB, 1768-ENBT, and 1768-EWEB...
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 allow remote attackers to cause a denial of service (control and communication outage) via a CIP message that modifies the (1) configuration or (2) network parameters.
- Record
GHSA-7q92-phh3-9wp8- Weakness
- CWE-284
- Updated
- 2026-11-02
NVD
When an affected product receives a valid CIP message from an unauthorized or unintended source to Port 2222/TCP, Port 2222/UDP, Port 44818/TCP, or Port 44818/UDP that changes the product’s configuration and network parameters, a DoS condition can occur. This situation could cause loss of availability and a disruption of communication 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
- Record
CVE-2012-6439- CVSS 2.0
- 8.5 High
AV:N/AC:L/Au:N/C:N/I:P/A:C - Weakness
- CWE-284
- Updated
- 2026-11-02
Affected products
- rockwell automation 1788-enbt flexlogix adapter
- rockwell automation 1794-aentr flex i/o ethernet/ip adapter
- rockwell automation compactlogix l32e and l35e controllers
- rockwell automation micrologix
- rockwell automation 1756-enbt, 1756-eweb, 1768-enbt, 1768-eweb communication modules
- rockwell automation compactlogix and softlogix controllers
- rockwell automation controllogix and guardlogix controllers
- rockwell automation controllogix, compactlogix, guardlogix, and softlogix
- rockwellautomation 1756-enbt
- rockwellautomation 1756-eweb
- rockwellautomation 1768-enbt
- rockwellautomation 1768-eweb
Show 13 moreShow less
- rockwellautomation compactlogix
- rockwellautomation compactlogix controllers
- rockwellautomation controllogix
- rockwellautomation controllogix controllers
- rockwellautomation guardlogix
- rockwellautomation guardlogix controllers
- rockwellautomation micrologix
- rockwellautomation softlogix
- rockwellautomation softlogix controllers
- rockwellautomation 1794-aentr flex i\/o ethernet\/ip adapter
- rockwellautomation compactlogix l32e controller
- rockwellautomation compactlogix l35e controller
- rockwellautomation flexlogix 1788-enbt adapter
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2012-6439 is a vulnerability (CVSS 8.5) in Rockwell Automation 1788-enbt Flexlogix Adapter, published January 24, 2013. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 23.2%, the 97th percentile. No source names a fixed version.
References
us-cert.gov/control_systems/pdf/ICSA-13-011-03.pdf
rockwellautomation.custhelp.com/app/answers/detail/a_id/470154
nvd.nist.gov/vuln/detail/CVE-2012-6439
github.com/advisories/GHSA-7q92-phh3-9wp8