# CVE-2012-6438

## Summary

- **CVE ID:** CVE-2012-6438
- **Severity:** HIGH
- **CVSS Score:** 7.8 (AV:N/AC:L/Au:N/C:N/I:N/A:C)
- **CWE:** CWE-119
- **Published:** Jan 24, 2013
- **Last Modified:** Jun 3, 2026

## Description

The device does not properly validate the data being sent to the buffer. An attacker can send a malformed CIP packet to Port 2222/TCP, Port 2222/UDP, Port 44818/TCP, or Port 44818/UDP, which creates a buffer overflow and causes the NIC to crash. Successful exploitation of this vulnerability could cause loss of availability 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

## Affected Products

- Rockwell Automation — 1756-ENBT, 1756-EWEB, 1768-ENBT, 1768-EWEB communication modules (All)
- Rockwell Automation — CompactLogix L32E and L35E controllers (All)
- Rockwell Automation — 1788-ENBT FLEXLogix adapter (All)
- Rockwell Automation — 1794-AENTR FLEX I/O EtherNet/IP adapter (All)
- Rockwell Automation — ControlLogix, CompactLogix, GuardLogix, and SoftLogix (0)
- Rockwell Automation — CompactLogix and SoftLogix controllers (0)
- Rockwell Automation — ControlLogix and GuardLogix controllers (0)
- Rockwell Automation — MicroLogix (1100)
- Rockwell Automation — MicroLogix (1400)

## References

- [CNA](https://www.cisa.gov/news-events/ics-advisories/icsa-13-011-03)
- [CNA](https://rockwellautomation.custhelp.com/app/answers/detail/a_id/470154)
- [CNA](https://rockwellautomation.custhelp.com/app/answers/detail/aid/470155)
- [CNA](https://rockwellautomation.custhelp.com/app/answers/detail/aid/470156)
- [CNA](http://rockwellautomation.custhelp.com/app/answers/detail/a_id/54102)
- [CVE](http://www.us-cert.gov/control_systems/pdf/ICSA-13-011-03.pdf)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 13.39%
- **EPSS Percentile:** 94.0

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-18._