CVE-2018-7850

mediumpriority · track · 22EPSS 0.015 · 74 %ileEURUUS
grimoire priorityP3 · Track
Exploitable?
—
no known exploitation
Likely / severe?
1.51% (74th) EPSS
CVSS 5 · medium
Is it mine?
16 products
Check your exposure
Who says so?
5 sources
cnnvd · enisa_euvd · fstec_bdu · cisa_csaf_ot

EPSS · scored 2026-10-23

A CWE-807: Reliance on Untrusted Inputs in a Security Decision vulnerability exists in all versions of the Modicon M580, Modicon M340, Modicon Quantum, and Modicon Premium which could cause invalid information displayed in Unity Pro software.

01

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

  • FixedModicon M340 Firmware Versions prior to v3.10 installed on Modicon M340 Controllercisa_csaf_ot

    Version sv3.60 of Modicon M340 includes a fix for this vulnerability and is available for download here: STEP 1: Update software and firmware • On the engineering workstation, update to EcoStruxure Control Expert v16.0 or later: https://www.se.com/ww/en/product-range/548-ecostruxure-control-expert-unity-pro/#software-and-firmware • On the Modicon M340 controller, update to firmware v3.60 or above: https://www.se.com/ww/en/product-range/1468- modicon-m340/#software-and-firmware STEP 2: Update projects in EcoStruxure Control Expert by: • Setting up an application password in the project properties • Changing the version of the controller firmware to match the new firmware version of the target controller STEP 3: Rebuild and transfer projects in EcoStruxure Control Expert: • Rebuild all current projects • Transfer them to Modicon controllers

    https://www.se.com/ww/en/product-range/1468-modicon-m340/#software-and-firmware
  • FixedModicon M580 Firmware Versions prior to v2.90 installed on Modicon M580 Controllercisa_csaf_ot

    Version sv4.20 of Modicon M580 includes a fix for this vulnerability and is available for download here: STEP 1: Update software and firmware. • On the engineering workstation, update to EcoStruxure Control Expert v16.0: https://www.se.com/ww/en/product-range/548-ecostruxure-control-expert-unity-pro/#software-and-firmware • On the Modicon M580 controller, update to firmware SV4.20 or above: https://www.se.com/ww/en/product-range/62098-modicon-m580-epac/#software-and-firmware STEP 2: Update projects in EcoStruxure Control Expert by: • Setting up an application password in the project properties • Changing the version of the controller firmware to match the new firmware version of the target controller STEP 3: Rebuild and transfer projects in EcoStruxure Control Expert: • Rebuild all current projects

    https://www.se.com/ww/en/product-range/62098-modicon-m580-epac/#software-and-firmware
  • MitigationModicon M340 Firmware Versions prior to v3.10 installed on Modicon M340 Controllercisa_csaf_ot

    It is recommended to apply the following mitigations to reduce the risk of exploitation: • Set up an application password in the project properties • Set up network segmentation and implement a firewall to block all unauthorized access to port 502/TCP • Configure the Access Control List following the recommendations of the user manuals: o “Modicon M340 for Ethernet Communications Modules and Processors User Manual” in chapter “Messaging Configuration Parameters”: https://www.se.com/ww/en/download/document/31007131K01000/ • Set up a secure communication according to the following guideline “Modicon Controllers Platform Cyber Security Reference Manual,” in chapter “Setup secured communications”: https://www.se.com/ww/en/download/document/EIO0000001999/ • Consider use of external firewall devices such as EAGLE40-07 from Belden to establish VPN connections for M340 & M580 architectures. For more details refer to the chapter “How to protect M580 and M340 architectures with EAGLE40 using VPN”: https://www.se.com/ww/en/download/document/EIO0000001999/

    https://www.se.com/ww/en/download/document/31007131K01000/
  • MitigationModicon M580 Firmware Versions prior to v2.90 installed on Modicon M580 Controllercisa_csaf_ot

    It is recommended to apply the following mitigations to reduce the risk of exploitation: • Set up an application password in the project properties • Set up network segmentation and implement a firewall to block all unauthorized access to port 502/TCP • Configure the Access Control List following the recommendations of the user manuals: https://www.se.com/ww/en/download/document/EIO0000001578/ • Set up a secure communication according to the following guideline “Modicon Controllers Platform Cyber Security Reference Manual,” in chapter “Setup secured communications”: https://www.se.com/ww/en/download/document/EIO0000001999/ NOTE: Use a BMENOC module and follow the instructions to configure IPSEC feature as described in the guideline “Modicon M580 - BMENOC03.1 Ethernet Communications Schneider Electric Security Notification Module, Installation and Configuration Guide” in the chapter “Configuring IPSEC communications”: https://www.se.com/ww/en/download/document/HRB62665/ OR • Use a BMENUA0100 module and follow the instructions to configure IPSEC feature as described in the chapter “Configuring the BMENUA0100 Cybersecurity Settings”: https://www.se.com/ww/en/download/document/PHA83350 OR • Consider using external firewall devices such as EAGLE40-07 from Belden to establish VPN connections for M340 and M580 architectures. For more details refer to the chapter “How to protect M580 and M340 architectures with EAGLE40 using VPN”: https://www.se.com/ww/en/download/document/EIO0000001999/ • Ensure the M580 CPU is running with the memory protection activated by configuring the input bit to a physical input, for more details refer to the following guideline “Modicon Controllers Platform Cyber Security Reference Manual”, “CPU Memory Protection section”: https://www.schneider-electric.com/en/download/document/EIO0000001999/ NOTE: The CPU memory protection cannot be configured with M580 Hot Standby CPUs. In such cases, use IPsec encrypted communication.

    https://www.se.com/ww/en/download/document/EIO0000001999/
  • MitigationModicon Premium Firmware All Versions installed on Modicon Premium Controllercisa_csaf_ot

    To mitigate the risks associated with Modbus/ weaknesses, users should immediately: • Set up network segmentation and implement a firewall to block all unauthorized access to port 502/TCP • Configure the Access Control List following the recommendations of the user manual “Premium and Atrium using EcoStruxure Control Expert - Ethernet Network Modules, User Manual” in chapters “Connection configuration parameters / TCP/IP Services Configuration Parameters / Connection Configuration Parameters”: https://www.se.com/ww/en/download/document/35006192K01000/

    https://www.se.com/ww/en/download/document/35006192K01000/
  • MitigationModicon Quantum Firmware All Versions installed on Modicon Quantum Controllercisa_csaf_ot

    To mitigate the risks associated with Modbus/ weaknesses, users should immediately: • Set up network segmentation and implement a firewall to block all unauthorized access to port 502/TCP • Configure the Access Control List feature as mentioned in “Quantum using EcoStruxure Control Expert - TCP/IP Configuration, User Manual” in chapter “Software Settings for Ethernet Communication / Messaging / Quantum NOE Ethernet Messaging Configuration”: https://www.se.com/ww/en/download/document/33002467K01000/

    https://www.se.com/ww/en/download/document/33002467K01000/
  • MitigationModicon Quantum Safety Firmware All Versions installed on Modicon Quantum Safety Controllercisa_csaf_ot

    To mitigate the risks associated with Modbus/ weaknesses, users should immediately: • Set up network segmentation and implement a firewall to block all unauthorized access to port 502/TCP • Configure the Access Control List feature as mentioned in “Quantum using EcoStruxure Control Expert - TCP/IP Configuration, User Manual” in chapter “Software Settings for Ethernet Communication / Messaging / Quantum NOE Ethernet Messaging Configuration”: https://www.se.com/ww/en/download/document/33002467K01000/

    https://www.se.com/ww/en/download/document/33002467K01000/
  • No fix plannedModicon Premium Firmware All Versions installed on Modicon Premium Controllercisa_csaf_ot

    Schneider Electric’s Modicon Premium controllers have reached their end of life and are no longer commercially available. They have been replaced by the Modicon M580 ePAC controller, our most current product offer. Customers should strongly consider migrating to the Modicon M580 ePAC. Please contact your local Schneider Electric technical support for more information.

  • No fix plannedModicon Quantum Firmware All Versions installed on Modicon Quantum Controllercisa_csaf_ot

    Schneider Electric’s Modicon Quantum and Quantum Safety controllers have reached their end of life and are no longer commercially available. They have been replaced by the Modicon M580 or M580 Safety ePAC controller, our most current product offer. Customers should strongly consider migrating to the Modicon M580 ePAC. Please contact your local Schneider Electric technical support for more information.

  • No fix plannedModicon Quantum Safety Firmware All Versions installed on Modicon Quantum Safety Controllercisa_csaf_ot

    Schneider Electric’s Modicon Quantum and Quantum Safety controllers have reached their end of life and are no longer commercially available. They have been replaced by the Modicon M580 or M580 Safety ePAC controller, our most current product offer. Customers should strongly consider migrating to the Modicon M580 ePAC. Please contact your local Schneider Electric technical support for more information.

02

cvss

Technical severity, 0–10. One row per scoring source.

7.5
010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 4.9–7.5

v2.05mediumAV:N/AC:L/Au:N/C:P/I:N/A:Nprimary · NVD / NIST USexploitability 10 · impact 2.9
v3.15.3mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:Nprimary · NVD / NIST USexploitability 3.9 · impact 1.4
v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:Nsecondary · CISA US
v3.15.3mediumAV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:Nsecondary · FSTEC (BDU) RU
v3.14.9mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:Usecondary · CVSS-BT (t0sche)
03

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-807USCWE-807US
04

affected products (16)

Products and version ranges known to be affected.

05

advisories (1)

Vendor and ecosystem advisories describing this.

  • ICSA-25-114-01Schneider Electric Modicon Controllers (Update A)2019-05-14icsa · cisa_csaf_otUS

    Schneider Electric is aware of multiple vulnerabilities in its Modicon Controller products. The [Modicon Programmable Automation controllers](https://www.se.com/ww/en/product-subcategory/3950-pac-programmable-automation-controllers/) are used for complex networked communication, display and control applications Failure to apply the mitigations or remediations provided below may risk execution of unsolicited command on the PLC which could result in a loss of availability of the controller.

06

also known as (4)

Other names and identifiers for this entity.

07

sources

Which sources assert this record, and when.

cnnvdenisa_euvdfstec_bducisa_csaf_otnvdNVDCVE.orgMITRE
published 2019-05-22modified 2026-06-17
08

references (8)

External citations — patches, advisories, analysis.

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