EUVD-2026-43693
GHSA-59qg-236r-79mg
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Network-reachable UDP flood with no auth or interaction and low complexity (AV:N/AC:L/PR:N/UI:N); impact is availability-only (A:H, C:N/I:N) with no scope change.
Primary rating from Vendor (Rockwell).
CVSS VectorVendor: Rockwell
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Lifecycle Timeline
2DescriptionCVE.org
A denial-of-service security issue exists in the 1719-AENTR. The security issue stems from improper handling of a UDP unicast network storm, which causes the device to become overloaded and lose communication. A power cycle is required to recover.
AnalysisAI
Denial-of-service in the Rockwell Automation 1719-AENTR (and companion 1718-AENTR) EtherNet/IP adapter allows remote attackers to overload the device with a UDP unicast network storm, causing loss of communication that requires a manual power cycle to recover. The CVSS 4.0 score of 8.7 reflects a high availability impact reachable over the network with no privileges or user interaction. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the attacker to be able to send UDP unicast traffic to the 1718-AENTR/1719-AENTR adapter and to sustain a network storm sufficient to overload it - the specific trigger named in the advisory is a UDP unicast network storm, not merely generic traffic. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The provided CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:N/UI:N) indicates a network-reachable, low-complexity attack requiring no authentication or interaction, with impact confined entirely to availability of the vulnerable system (VA:H; VC:N/VI:N/VA:H, no subsequent-system scope). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker with access to the OT network segment - for example via a compromised engineering workstation or an exposed/flat industrial network - directs a sustained stream of UDP unicast packets at a 1719-AENTR adapter. The adapter's resources are exhausted, it stops communicating with its Logix controller and distributed I/O, and operators must physically power-cycle the module to restore control, causing a process outage. … |
| Remediation | Consult Rockwell Automation advisory SD1778 (https://www.rockwellautomation.com/en-us/trust-center/security-advisories/advisory.SD1778.html) for the vendor-recommended fixed firmware; an exact patched version is not specified in the provided data, so treat patch status as 'Patch available per vendor advisory' pending confirmation of the exact release. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all deployed Rockwell Automation 1719-AENTR and 1718-AENTR adapters and identify which are externally or broadly internally accessible. …
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Same technique Denial Of Service
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External POC / Exploit Code
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