CVE-2023-3596
Rockwell Automation Allen-Bradley ControlLogix Communication Modules vulnerable to Denial of Service
Where this vulnerability exists in the Rockwell Automation 1756-EN4* Ethernet/IP communication products, it could allow a malicious user to cause a denial of service by asserting the target system through maliciously crafted CIP messages.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
Rockwell Automation Allen-Bradley ControlLogix Communication Modules vulnerable to Denial of Service
Where this vulnerability exists in the Rockwell Automation 1756-EN4* Ethernet/IP communication products, it could allow a malicious user to cause a denial of service by asserting the target system through maliciously crafted CIP messages.
- Record
CVE-2023-3596- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-787
- Updated
- 2026-11-02
EUVDEUVD-2023-44246
Where this vulnerability exists in the Rockwell Automation 1756-EN4* Ethernet/IP communication products, it could allow a malicious user to cause a denial of service by asserting the target system through maliciously crafted CIP messages.
- Record
EUVD-2023-44246- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-xvq9-c88q-jf5x
Where this vulnerability exists in the Rockwell Automation 1756-EN4* Ethernet/IP communication...
Where this vulnerability exists in the Rockwell Automation 1756-EN4* Ethernet/IP communication products, it could allow a malicious user to cause a denial of service by asserting the target system through maliciously crafted CIP messages.
- Record
GHSA-xvq9-c88q-jf5x- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-787
- Updated
- 2026-11-02
NVD
Where this vulnerability exists in the Rockwell Automation 1756-EN4* Ethernet/IP communication products, it could allow a malicious user to cause a denial of service by asserting the target system through maliciously crafted CIP messages.
- Record
CVE-2023-3596- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-787
- Updated
- 2026-11-02
Affected products
- rockwell automation 1756-en4tr series a
- rockwell automation 1756-en4trk series a
- rockwell automation 1756-en4trxt series a
- rockwellautomation 1756-en4tr
- rockwellautomation 1756-en4tr firmware
- rockwellautomation 1756-en4trk
- rockwellautomation 1756-en4trk firmware
- rockwellautomation 1756-en4trxt
- rockwellautomation 1756-en4trxt firmware
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases, published | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2023-3596 is a high vulnerability (CVSS 7.5) in Rockwell Automation 1756-en4tr Series A, published July 12, 2023. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 3.71%, the 89th percentile. No source names a fixed version.