Missing authentication in Rockwell Automation
Priority MEDIUM 52CWE-306Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-306.
Summary
Rockwell Automation MicroLogix 1400 Controllers and 1756 ControlLogix Communications Modules An unauthenticated, remote threat actor could send a CIP connection request to an affected device, and upon successful connection, send a new IP configuration to the affected device even if the controller in the system is set to Hard RUN mode. When the affected device accepts this new IP configuration, a loss of communication occurs between the device and the rest of the system as the system traffic is still attempting to communicate with the device via the overwritten IP address.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.05845 93rd 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 Automation | MicroLogix 1400 Controllers Series A, all versions, Series B, v21.003 and earlier,Series C, v21.003 and earlier, 1756 ControlLogix EtherNet/IP Communications Modules 1756-ENBT, all versions, 1756-EWEB Series A, all versions Series B, all versions, 1756-EN2F Series A, all versions, Series B, all versions, Series C, v10.10 and earlier, 1756-EN2T, Series A, all versions, Series B, all versions, Series C, all versions, Series D, v10.10 and earlier, 1756-EN2TR, Series A, all versions, Series B, all versions, Series C, v10.10 and earlier, 1756-EN3TR, Series A, all versions, Series B, v10.10 and earlier. | — | No fix listed | CNA |
- Rockwell Automation Vendor— Affected MicroLogix 1400 Controllers Series A, all versions, Series B, v21.003 and earlier,Series C, v21.003 and earlier, 1756 ControlLogix EtherNet/IP Communications Modules 1756-ENBT, all versions, 1756-EWEB Series A, all versions Series B, all versions, 1756-EN2F Series A, all versions, Series B, all versions, Series C, v10.10 and earlier, 1756-EN2T, Series A, all versions, Series B, all versions, Series C, all versions, Series D, v10.10 and earlier, 1756-EN2TR, Series A, all versions, Series B, all versions, Series C, v10.10 and earlier, 1756-EN3TR, Series A, all versions, Series B, v10.10 and earlier. Fixed in — No fix listed CNA
CPE configurations NVD · 32
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:rockwellautomation:micrologix_1400_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Rockwell |
| cpe:2.3:h:rockwellautomation:micrologix_1400:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Rockwell |
| cpe:2.3:o:rockwellautomation:1756-enbt_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Rockwell |
| cpe:2.3:h:rockwellautomation:1756-enbt:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Rockwell |
| cpe:2.3:o:rockwellautomation:1756-eweb_series_a_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Rockwell |
| cpe:2.3:h:rockwellautomation:1756-eweb_series_a:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Rockwell |
| cpe:2.3:o:rockwellautomation:1756-eweb_series_b_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Rockwell |
| cpe:2.3:h:rockwellautomation:1756-eweb_series_b:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Rockwell |
| cpe:2.3:o:rockwellautomation:1756-en2f_series_a_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Rockwell |
| cpe:2.3:h:rockwellautomation:1756-en2f_series_a:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Rockwell |
- cpe:2.3:o:rockwellautomation:micrologix_1400_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Rockwell
- cpe:2.3:h:rockwellautomation:micrologix_1400:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Rockwell
- cpe:2.3:o:rockwellautomation:1756-enbt_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Rockwell
- cpe:2.3:h:rockwellautomation:1756-enbt:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Rockwell
- cpe:2.3:o:rockwellautomation:1756-eweb_series_a_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Rockwell
- cpe:2.3:h:rockwellautomation:1756-eweb_series_a:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Rockwell
- cpe:2.3:o:rockwellautomation:1756-eweb_series_b_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Rockwell
- cpe:2.3:h:rockwellautomation:1756-eweb_series_b:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Rockwell
- cpe:2.3:o:rockwellautomation:1756-en2f_series_a_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Rockwell
- cpe:2.3:h:rockwellautomation:1756-en2f_series_a:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Rockwell
Show 22 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:rockwellautomation:1756-en2f_series_b_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Rockwell |
| cpe:2.3:h:rockwellautomation:1756-en2f_series_b:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Rockwell |
| cpe:2.3:o:rockwellautomation:1756-en2f_series_c_firmware:*:*:*:*:*:*:*:* | up to 10.10 | Vulnerable | Rockwell |
| cpe:2.3:h:rockwellautomation:1756-en2f_series_c:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Rockwell |
| cpe:2.3:o:rockwellautomation:1756-en2t_series_a_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Rockwell |
| cpe:2.3:h:rockwellautomation:1756-en2t_series_a:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Rockwell |
| cpe:2.3:o:rockwellautomation:1756-en2t_series_b_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Rockwell |
| cpe:2.3:h:rockwellautomation:1756-en2t_series_b:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Rockwell |
| cpe:2.3:o:rockwellautomation:1756-en2t_series_c_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Rockwell |
| cpe:2.3:h:rockwellautomation:1756-en2t_series_c:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Rockwell |
| cpe:2.3:o:rockwellautomation:1756-en2t_series_d_firmware:*:*:*:*:*:*:*:* | up to 10.10 | Vulnerable | Rockwell |
| cpe:2.3:h:rockwellautomation:1756-en2t_series_d:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Rockwell |
| cpe:2.3:o:rockwellautomation:1756-en2tr_series_a_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Rockwell |
| cpe:2.3:h:rockwellautomation:1756-en2tr_series_a:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Rockwell |
| cpe:2.3:o:rockwellautomation:1756-en2tr_series_b_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Rockwell |
| cpe:2.3:h:rockwellautomation:1756-en2tr_series_b:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Rockwell |
| cpe:2.3:o:rockwellautomation:1756-en2tr_series_c_firmware:*:*:*:*:*:*:*:* | up to 10.10 | Vulnerable | Rockwell |
| cpe:2.3:h:rockwellautomation:1756-en2tr_series_c:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Rockwell |
| cpe:2.3:o:rockwellautomation:1756-en3tr_series_a_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Rockwell |
| cpe:2.3:h:rockwellautomation:1756-en3tr_series_a:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Rockwell |
| cpe:2.3:o:rockwellautomation:1756-en3tr_series_b_firmware:*:*:*:*:*:*:*:* | up to 10.10 | Vulnerable | Rockwell |
| cpe:2.3:h:rockwellautomation:1756-en3tr_series_b:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Rockwell |
- cpe:2.3:o:rockwellautomation:1756-en2f_series_b_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Rockwell
- cpe:2.3:h:rockwellautomation:1756-en2f_series_b:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Rockwell
- cpe:2.3:o:rockwellautomation:1756-en2f_series_c_firmware:*:*:*:*:*:*:*:* Versions up to 10.10 Vulnerable ·Rockwell
- cpe:2.3:h:rockwellautomation:1756-en2f_series_c:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Rockwell
- cpe:2.3:o:rockwellautomation:1756-en2t_series_a_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Rockwell
- cpe:2.3:h:rockwellautomation:1756-en2t_series_a:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Rockwell
- cpe:2.3:o:rockwellautomation:1756-en2t_series_b_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Rockwell
- cpe:2.3:h:rockwellautomation:1756-en2t_series_b:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Rockwell
- cpe:2.3:o:rockwellautomation:1756-en2t_series_c_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Rockwell
- cpe:2.3:h:rockwellautomation:1756-en2t_series_c:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Rockwell
- cpe:2.3:o:rockwellautomation:1756-en2t_series_d_firmware:*:*:*:*:*:*:*:* Versions up to 10.10 Vulnerable ·Rockwell
- cpe:2.3:h:rockwellautomation:1756-en2t_series_d:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Rockwell
- cpe:2.3:o:rockwellautomation:1756-en2tr_series_a_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Rockwell
- cpe:2.3:h:rockwellautomation:1756-en2tr_series_a:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Rockwell
- cpe:2.3:o:rockwellautomation:1756-en2tr_series_b_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Rockwell
- cpe:2.3:h:rockwellautomation:1756-en2tr_series_b:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Rockwell
- cpe:2.3:o:rockwellautomation:1756-en2tr_series_c_firmware:*:*:*:*:*:*:*:* Versions up to 10.10 Vulnerable ·Rockwell
- cpe:2.3:h:rockwellautomation:1756-en2tr_series_c:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Rockwell
- cpe:2.3:o:rockwellautomation:1756-en3tr_series_a_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Rockwell
- cpe:2.3:h:rockwellautomation:1756-en3tr_series_a:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Rockwell
- cpe:2.3:o:rockwellautomation:1756-en3tr_series_b_firmware:*:*:*:*:*:*:*:* Versions up to 10.10 Vulnerable ·Rockwell
- cpe:2.3:h:rockwellautomation:1756-en3tr_series_b:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Rockwell
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2018-17924
- 2026-10-03 Alias added: GHSA-w6vr-5wrp-c9p7
References
More Rockwell 1756-en2f Series A Firmware vulnerabilities
- TI-2023-02121 Rockwell Automation Select Logix Communication Modules Vulnerable to Email Object Buffer Overflow CVSS 3.1CRITICAL 9.8
- TI-2023-03355 Rockwell Automation ControlLogix Communication Modules Vulnerable to Remote Code Execution CVSS 3.1CRITICAL 9.8
Sources
- CVE-2018-17924 · CVE Program
- CVE-2018-17924 · NVD
- FIRST EPSS
- GHSA-w6vr-5wrp-c9p7 · 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