CVE-2018-7853

mediumpriority · track · 31EPSS 0.018 · 79 %ileEURUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

1.82% (79th) EPSS

CVSS 5 · medium

Is it mine?

8 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · fstec_bdu · cisa_csaf_ot

EPSS · scored 2026-10-23

A CWE-248: Uncaught Exception vulnerability exists in all versions of the Modicon M580, Modicon M340, Modicon Quantum, and Modicon Premium which could cause denial of service when reading invalid physical memory blocks in the controller over Modbus

remediations

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

A vendor fix is available.

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 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/

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 · 5–7.5

v2.05mediumAV:N/AC:L/Au:N/C:N/I:N/A:Pprimary · NVD / NIST USexploitability 10 · impact 2.9

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 3.6

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · CISA US

v3.17.5highAV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · FSTEC (BDU) RU

v3.16.9mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-754USprimaryCWE-248USCWE-248US

affected products (8)

Products and version ranges known to be affected.

Modicon M580 Firmware Version 4.20 installed on Modicon M580 Controllerall versionsfixedcisa_csaf_otUS
Modicon M580 Firmware Versions prior to v2.90 installed on Modicon M580 Controllerall versionscisa_csaf_otUS
n/a Modicon M580 Modicon M340 Modicon Quantum Modicon Premium≤ Modicon M580 Modicon M340 Modicon Quantum Modicon Premiumenisa_euvdEU
Schneider Electric Modicon M580all versionsfstec_bduRU
schneider-electric modicon m340 firmware< 3.10nvdUScpe:2.3:o:schneider-electric:modicon_m340_firmware:*:*:*:*:*:*:*:*
schneider-electric modicon m580 firmware< 2.90nvdUScpe:2.3:o:schneider-electric:modicon_m580_firmware:*:*:*:*:*:*:*:*
schneider-electric modicon premium firmwareall versionsnvdUScpe:2.3:o:schneider-electric:modicon_premium_firmware:*:*:*:*:*:*:*:*
schneider-electric modicon quantum firmwareall versionsnvdUScpe:2.3:o:schneider-electric:modicon_quantum_firmware:*:*:*:*:*:*:*:*

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.

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cisa_csaf_ot nvd NVD CVE.org MITRE

published 2019-05-22modified 2026-06-17

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references (8)

External citations — patches, advisories, analysis.

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