Rockwell Automation ControlLogix PLC Improper Input Validation
Priority HIGH 65CWE-119Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-119 and the CVSS impact.
Summary
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
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.35534 98th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Rockwell | 1756-ENBT, 1756-EWEB, 1768-ENBT, 1768-EWEB communication modules | All | — | No fix listed | CNA |
| Rockwell | CompactLogix L32E and L35E controllers | All | — | No fix listed | CNA |
| Rockwell | 1788-ENBT FLEXLogix adapter | All | — | No fix listed | CNA |
| Rockwell | 1794-AENTR FLEX I/O EtherNet/IP adapter | All | — | No fix listed | CNA |
| Rockwell | ControlLogix, CompactLogix, GuardLogix, and SoftLogix | up to 18 | — | No fix listed | CNA |
| Rockwell | CompactLogix and SoftLogix controllers | up to 19 | — | No fix listed | CNA |
| Rockwell | ControlLogix and GuardLogix controllers | up to 20 | — | No fix listed | CNA |
| Rockwell | MicroLogix | 1100; 1400 | — | No fix listed | CNA |
- 1756-ENBT, 1756-EWEB, 1768-ENBT, 1768-EWEB communication modules VendorRockwell Affected All Fixed in — No fix listed CNA
- CompactLogix L32E and L35E controllers VendorRockwell Affected All Fixed in — No fix listed CNA
- 1788-ENBT FLEXLogix adapter VendorRockwell Affected All Fixed in — No fix listed CNA
- 1794-AENTR FLEX I/O EtherNet/IP adapter VendorRockwell Affected All Fixed in — No fix listed CNA
- ControlLogix, CompactLogix, GuardLogix, and SoftLogix VendorRockwell Affected up to 18 Fixed in — No fix listed CNA
- CompactLogix and SoftLogix controllers VendorRockwell Affected up to 19 Fixed in — No fix listed CNA
- ControlLogix and GuardLogix controllers VendorRockwell Affected up to 20 Fixed in — No fix listed CNA
- MicroLogix VendorRockwell Affected 1100; 1400 Fixed in — No fix listed CNA
CPE configurations NVD · 17
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:rockwellautomation:controllogix_controllers:*:*:*:*:*:*:*:* | up to 20 | Vulnerable | Rockwell |
| cpe:2.3:a:rockwellautomation:guardlogix_controllers:*:*:*:*:*:*:*:* | up to 20 | Vulnerable | Rockwell |
| cpe:2.3:a:rockwellautomation:micrologix:*:*:*:*:*:*:*:* | up to 1100; up to 1400 | Vulnerable | Rockwell |
| cpe:2.3:a:rockwellautomation:softlogix_controllers:*:*:*:*:*:*:*:* | up to 19 | Vulnerable | Rockwell |
| cpe:2.3:h:rockwellautomation:1756-enbt:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Rockwell |
| cpe:2.3:h:rockwellautomation:1756-eweb:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Rockwell |
| cpe:2.3:h:rockwellautomation:1768-enbt:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Rockwell |
| cpe:2.3:h:rockwellautomation:1768-eweb:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Rockwell |
| cpe:2.3:h:rockwellautomation:1794-aentr_flex_i\/o_ethernet\/ip_adapter:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Rockwell |
| cpe:2.3:h:rockwellautomation:compactlogix:*:*:*:*:*:*:*:* | up to 18 | Vulnerable | Rockwell |
- cpe:2.3:a:rockwellautomation:controllogix_controllers:*:*:*:*:*:*:*:* Versions up to 20 Vulnerable ·Rockwell
- cpe:2.3:a:rockwellautomation:guardlogix_controllers:*:*:*:*:*:*:*:* Versions up to 20 Vulnerable ·Rockwell
- cpe:2.3:a:rockwellautomation:micrologix:*:*:*:*:*:*:*:* Versions up to 1100; up to 1400 Vulnerable ·Rockwell
- cpe:2.3:a:rockwellautomation:softlogix_controllers:*:*:*:*:*:*:*:* Versions up to 19 Vulnerable ·Rockwell
- cpe:2.3:h:rockwellautomation:1756-enbt:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Rockwell
- cpe:2.3:h:rockwellautomation:1756-eweb:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Rockwell
- cpe:2.3:h:rockwellautomation:1768-enbt:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Rockwell
- cpe:2.3:h:rockwellautomation:1768-eweb:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Rockwell
- cpe:2.3:h:rockwellautomation:1794-aentr_flex_i\/o_ethernet\/ip_adapter:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Rockwell
- cpe:2.3:h:rockwellautomation:compactlogix:*:*:*:*:*:*:*:* Versions up to 18 Vulnerable ·Rockwell
Show 7 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:h:rockwellautomation:compactlogix_controllers:*:*:*:*:*:*:*:* | up to 19 | Vulnerable | Rockwell |
| cpe:2.3:h:rockwellautomation:compactlogix_l32e_controller:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Rockwell |
| cpe:2.3:h:rockwellautomation:compactlogix_l35e_controller:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Rockwell |
| cpe:2.3:h:rockwellautomation:controllogix:*:*:*:*:*:*:*:* | up to 18 | Vulnerable | Rockwell |
| cpe:2.3:h:rockwellautomation:flexlogix_1788-enbt_adapter:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Rockwell |
| cpe:2.3:h:rockwellautomation:guardlogix:*:*:*:*:*:*:*:* | up to 18 | Vulnerable | Rockwell |
| cpe:2.3:h:rockwellautomation:softlogix:*:*:*:*:*:*:*:* | up to 18 | Vulnerable | Rockwell |
- cpe:2.3:h:rockwellautomation:compactlogix_controllers:*:*:*:*:*:*:*:* Versions up to 19 Vulnerable ·Rockwell
- cpe:2.3:h:rockwellautomation:compactlogix_l32e_controller:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Rockwell
- cpe:2.3:h:rockwellautomation:compactlogix_l35e_controller:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Rockwell
- cpe:2.3:h:rockwellautomation:controllogix:*:*:*:*:*:*:*:* Versions up to 18 Vulnerable ·Rockwell
- cpe:2.3:h:rockwellautomation:flexlogix_1788-enbt_adapter:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Rockwell
- cpe:2.3:h:rockwellautomation:guardlogix:*:*:*:*:*:*:*:* Versions up to 18 Vulnerable ·Rockwell
- cpe:2.3:h:rockwellautomation:softlogix:*:*:*:*:*:*:*:* Versions up to 18 Vulnerable ·Rockwell
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2012-6438
- 2026-10-03 Alias added: GHSA-qrw8-3h67-8hff
- 2026-10-31 Priority changed: MEDIUM → HIGH
References
Other 5
- https://www.cisa.gov/news-events/ics-advisories/icsa-13-011-03
- https://rockwellautomation.custhelp.com/app/answers/detail/a_id/470154
- https://rockwellautomation.custhelp.com/app/answers/detail/aid/470155
- https://rockwellautomation.custhelp.com/app/answers/detail/aid/470156
- http://rockwellautomation.custhelp.com/app/answers/detail/a_id/54102
More Rockwell 1756-enbt vulnerabilities
- TI-2012-05182 Rockwell Automation ControlLogix PLC Improper Access Control CVSS 3.1HIGH 7.5
- TI-2012-05183 Rockwell Automation ControlLogix PLC Improper Input Validation CVSS 3.1HIGH 7.5
- TI-2012-05184 Rockwell Automation ControlLogix PLC Improper Authentication CVSS 3.1CRITICAL 9.8
- TI-2012-05186 Rockwell Automation ControlLogix PLC Improper Access Control CVSS 2.0HIGH 8.5
- TI-2012-05188 Rockwell Automation ControlLogix PLC Information Exposure CVSS 2.0MEDIUM 5.0
- TI-2012-05187 Rockwell Automation ControlLogix PLC Improper Input Validation CVSS 3.1MEDIUM 4.8
Sources
- CVE-2012-6438 · CVE Program
- CVE-2012-6438 · NVD
- FIRST EPSS
- GHSA-qrw8-3h67-8hff · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences