CVE-2026-1874

Always-Incorrect Control Flow Implementation vulnerability in Mitsubishi Electric Corporation MELSEC iQ-F Series FX5-ENET/IP Ethernet Module FX5-ENET/IP versions 1.106 and prior and Mitsubishi Electric Corporation MELSEC iQ-F Series FX5-EIP EtherNet/IP Module FX5-EIP versions 1.000 and prior allows a remote attacker to cause a denial-of-service (DoS) condition on the products by continuously sending UDP packets to the products. A system reset of the product is required for recovery.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://jvn.jp/vu/JVNVU93286687/	Third Party Advisory
https://www.cisa.gov/news-events/ics-advisories/icsa-26-62-01	Third Party Advisory
https://www.mitsubishielectric.com/psirt/vulnerability/pdf/2025-021_en.pdf	Vendor Advisory

Configurations

Configuration 1 (hide)

AND

cpe:2.3:o:mitsubishielectric:melsec_iq-f_fx5-eip_firmware:*:*:*:*:*:*:*:*

cpe:2.3:h:mitsubishielectric:melsec_iq-f_fx5-eip:-:*:*:*:*:*:*:*

Configuration 2 (hide)

AND

cpe:2.3:o:mitsubishielectric:melsec_iq-f_fx5-enet\/ip_firmware:*:*:*:*:*:*:*:*

cpe:2.3:h:mitsubishielectric:melsec_iq-f_fx5-enet\/ip:-:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-03-03 07:16

Updated : 2026-06-17 10:16

NVD link : CVE-2026-1874

Mitre link : CVE-2026-1874

CVE.ORG link : CVE-2026-1874

JSON object : View

Products Affected

mitsubishielectric

melsec_iq-f_fx5-enet\/ip_firmware
melsec_iq-f_fx5-eip_firmware
melsec_iq-f_fx5-enet\/ip
melsec_iq-f_fx5-eip

CWE

CWE-670

Always-Incorrect Control Flow Implementation

{"id": "CVE-2026-1874", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-1874", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-03-03T14:35:32.565171Z"}}], "cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 3.9}], "cvssMetricV40": [{"type": "Secondary", "source": "Mitsubishielectric.Psirt@yd.MitsubishiElectric.co.jp", "cvssData": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 8.7, "Automatable": "NOT_DEFINED", "attackVector": "NETWORK", "baseSeverity": "HIGH", "valueDensity": "NOT_DEFINED", "vectorString": "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", "exploitMaturity": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "userInteraction": "NONE", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "subIntegrityImpact": "NONE", "vulnIntegrityImpact": "NONE", "integrityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "availabilityRequirement": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "NONE", "confidentialityRequirement": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED"}}]}, "affected": [{"source": "Mitsubishielectric.Psirt@yd.MitsubishiElectric.co.jp", "affectedData": [{"vendor": "Mitsubishi Electric Corporation", "product": "MELSEC iQ-F Series FX5-ENET/IP Ethernet Module FX5-ENET/IP", "versions": [{"status": "affected", "version": "versions 1.106 and prior"}], "defaultStatus": "unaffected"}, {"vendor": "Mitsubishi Electric Corporation", "product": "MELSEC iQ-F Series FX5-EIP EtherNet/IP Module FX5-EIP", "versions": [{"status": "affected", "version": "versions 1.000 and prior"}], "defaultStatus": "unaffected"}]}], "published": "2026-03-03T07:16:10.067", "references": [{"url": "https://jvn.jp/vu/JVNVU93286687/", "tags": ["Third Party Advisory"], "source": "Mitsubishielectric.Psirt@yd.MitsubishiElectric.co.jp"}, {"url": "https://www.cisa.gov/news-events/ics-advisories/icsa-26-62-01", "tags": ["Third Party Advisory"], "source": "Mitsubishielectric.Psirt@yd.MitsubishiElectric.co.jp"}, {"url": "https://www.mitsubishielectric.com/psirt/vulnerability/pdf/2025-021_en.pdf", "tags": ["Vendor Advisory"], "source": "Mitsubishielectric.Psirt@yd.MitsubishiElectric.co.jp"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "Mitsubishielectric.Psirt@yd.MitsubishiElectric.co.jp", "description": [{"lang": "en", "value": "CWE-670"}]}], "descriptions": [{"lang": "en", "value": "Always-Incorrect Control Flow Implementation vulnerability in Mitsubishi Electric Corporation MELSEC iQ-F Series FX5-ENET/IP Ethernet Module FX5-ENET/IP versions 1.106 and prior and Mitsubishi Electric Corporation MELSEC iQ-F Series FX5-EIP EtherNet/IP Module FX5-EIP versions 1.000 and prior allows a remote attacker to cause a denial-of-service (DoS) condition on the products by continuously sending UDP packets to the products. A system reset of the product is required for recovery."}, {"lang": "es", "value": "Vulnerabilidad de implementaci\u00f3n de flujo de control siempre incorrecto en Mitsubishi Electric Corporation MELSEC iQ-F Series FX5-ENET/IP Ethernet Module FX5-ENET/IP versiones 1.106 y anteriores y Mitsubishi Electric Corporation MELSEC iQ-F Series FX5-EIP EtherNet/IP Module FX5-EIP todas las versiones permite a un atacante remoto causar una condici\u00f3n de denegaci\u00f3n de servicio (DoS) en los productos al enviar continuamente paquetes UDP a los productos. Se requiere un reinicio del sistema del producto para la recuperaci\u00f3n."}], "lastModified": "2026-06-17T10:16:38.670", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:mitsubishielectric:melsec_iq-f_fx5-eip_firmware:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "CA5DF40B-18EF-4115-9AE8-A64F3607CA7A", "versionEndIncluding": "1.000"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:h:mitsubishielectric:melsec_iq-f_fx5-eip:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "D941E7FD-DC6C-413B-B08C-A4CE18C2D7F9"}], "operator": "OR"}], "operator": "AND"}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:mitsubishielectric:melsec_iq-f_fx5-enet\\/ip_firmware:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "9D2B0F6C-6AD2-4A95-9492-FE7D048A665F", "versionEndIncluding": "1.106"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:h:mitsubishielectric:melsec_iq-f_fx5-enet\\/ip:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "C52725C6-F540-4F35-BEA0-1F72B42C0729"}], "operator": "OR"}], "operator": "AND"}], "sourceIdentifier": "Mitsubishielectric.Psirt@yd.MitsubishiElectric.co.jp"}