EUVD-2026-43694
GHSA-7jrm-8f72-vqwm
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
Unauthenticated network CIP message (AV:N/AC:L/PR:N/UI:N) causes module fault with availability-only impact (A:H) and no confidentiality or integrity effect.
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 1734 POINT I/O™ module. The security issue stems from improper handling of crafted CIP messages, which can cause the module to enter a faulted state. A restart is required to recover.
AnalysisAI
Remote denial-of-service in Rockwell Automation's 1734 POINT I/O module allows unauthenticated network attackers to force the module into a faulted state by sending specially crafted CIP (Common Industrial Protocol) messages, halting I/O processing until a manual restart is performed. The CVSS 4.0 base score of 8.7 reflects a high availability impact against a network-reachable OT device with no privileges or user interaction required. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires network reachability to a 1734 POINT I/O module's EtherNet/IP/CIP interface and the ability to send a crafted CIP message; per the CVSS vector (AV:N/AC:L/PR:N/UI:N) no authentication, privileges, or user interaction are needed against a reachable module. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H) is internally consistent with the description: a network-reachable, low-complexity, unauthenticated attack with pure availability impact and no confidentiality or integrity loss. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker with access to the OT network - for example after pivoting from a compromised engineering workstation or through an inadequately segmented cell/area zone - sends a crafted CIP message to a 1734 POINT I/O module over EtherNet/IP. Because no authentication or user interaction is required (AV:N/PR:N/UI:N) and complexity is low, the malformed message drives the module into a faulted state, stopping I/O and forcing a manual restart to recover. … |
| Remediation | Consult Rockwell Automation advisory SD1779 (https://www.rockwellautomation.com/en-us/trust-center/security-advisories/advisory.SD1779.html) for vendor-provided firmware updates and affected catalog numbers; no exact fix version is present in the available input data, so apply the patched firmware version named in that advisory once identified. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify and inventory all 1734 POINT I/O modules in production and document their network exposure. …
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Same technique Denial Of Service
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External POC / Exploit Code
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