EUVD-2026-51024
GHSA-r2qx-6p3c-jwf2
Severity by source
CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:L/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
Adjacent TSN access only (AV:A); 'specific timing conditions' raise complexity (AC:H); no auth/UI (PR:N/UI:N); control-data tampering gives I:H, DoS gives A:L, no data exposure (C:N).
Primary rating from Vendor (yd).
CVSS VectorVendor: yd
CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:L/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
Improper Enforcement of Message Integrity During Transmission in a Communication Channel vulnerability in Mitsubishi Electric MELSEC MX Controller MX-R model, MELSEC MX Controller MX-F model, Master/local module, CC-Link IE TSN interface board, Motion module, Motion Control Board, Block-type remote module, Block-type remote module with safety functions, Analog-Digital converter module, Digital-Analog converter module, CC-Link IE TSN compatible coupler, FPGA module, Tension meter, AC Servo MELSERVO-J5, AC Servo MELSERVO-JET, Liner Track System MTR-S series Linear track control module, Inverter FR-A800/F800/E800 Series, Industrial Robot CR800-D series controller Network Base Card, CC-Link IE TSN expansion unit, CC-Link IE TSN-CC-Link IE Field Network bridge module, CC-Link IE TSN-AnyWireASLINK bridge module, Energy Measuring Unit CC-Link IE TSN Communication Unit, Industrial Computer MELIPC series, GOT3000 Series, CC-Link IE TSN Communication Unit, Motion Control Software, CC-Link IE TSN Communication Software for Windows, Analysis Support Software MELSOFT VIMA, Master/Local module Designated communication LSI DeviceKit, Master/Local module Designated communication LSI, Remote Station Communication LSI with GbE-PHY, CC-Link IE TSN Master/Local module Designated communication LSI SDK, and Remote station software development kit allows an attacker with access to a CC-Link IE TSN network to tamper with communication data (control input/output values) by sending specially crafted packets under specific timing conditions. This could allow the attacker to cause a denial-of-service (DoS) condition in the affected product by interfering with its control function or causing it to operate incorrectly.
AnalysisAI
Communication-data tampering in Mitsubishi Electric's CC-Link IE TSN product family - spanning MELSEC MX Controllers, motion modules, MELSERVO-J5/JET AC servos, FR-A800/F800/E800 inverters, GOT3000 HMIs, remote I/O modules and TSN communication LSIs/SDKs - allows an attacker on the same CC-Link IE TSN network to forge control input/output values by injecting specially crafted packets under specific timing conditions. Because message integrity is not enforced on the channel (CWE-924), successful tampering can drive incorrect operation of the control function or produce a denial-of-service condition on the affected device. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the attacker to have logical access to the CC-Link IE TSN network segment on which the target device operates (CVSS AV:A adjacent) and the ability to send specially crafted packets that are consumed during specific timing windows aligned with the TSN cyclic communication schedule - the description's 'under specific timing conditions' is the concrete limiting prerequisite. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The supplied CVSS 4.0 vector (AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:L, base 7.1) is consistent with an unauthenticated, adjacent-network integrity attack: high impact to integrity of control data, low availability impact (DoS), and no confidentiality exposure. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker who has gained a foothold on the plant's CC-Link IE TSN segment (via a compromised engineering workstation, HMI, or physical port access) injects specially crafted frames timed to the TSN cyclic schedule, overwriting the control I/O values exchanged between a master module and a MELSERVO-J5 servo or FR-A800 inverter. The forged values cause the drive to act on incorrect commands or halt, producing erratic machine motion or a denial-of-service on the control function. … |
| Remediation | No vendor-released fixed version is identified in the available data (EUVD lists 'all versions' affected and the reference is an advisory PDF, not a tagged release), so treat mitigation as compensating-control-driven and consult https://www.mitsubishielectric.com/psirt/vulnerability/pdf/2026-005_en.pdf (Mitsubishi Electric advisory 2026-005) for any product-specific patches or firmware as they are published. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all Mitsubishi Electric CC-Link IE TSN devices in your environment (MELSEC MX Controllers, MELSERVO-J5/JET servos, FR-A800/F800/E800 inverters, GOT3000 HMIs, and remote I/O modules) and confirm network segmentation of CC-Link IE TSN segments from corporate networks. …
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