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No exploitation reportedFix available

CVE-2018-7857

No exploitation reported by the sources we read.

  • Published2019-05-22
  • Fixed in3.01
  • WeaknessCWE-754

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

A CWE-248: Uncaught Exception vulnerability exists in all versions of the Modicon M580, Modicon M340, Modicon Quantum, and Modicon Premium which could cause a possible Denial of Service when writing out of bounds variables to the controller over Modbus.

Timeline

dates in UTC
  1. 2019-05-2221:29CVE publishedNVD

Versions per branch

NVD
Schneider-electric modicon m340 firmwareversion to verify
BranchAffectedFixed in
3.1< 3.013.01
Schneider-electric modicon m580 firmwareversion to verify
BranchAffectedFixed in
2.80< 2.802.80
Schneider-electric modicon premium firmwareversion to verify
BranchAffectedFixed in
3.20< 3.203.20

1 more product in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Vendor advisories

  • ICSA-25-114-01 CISA3 products fixed · 8 known affected

    Schneider Electric Modicon Controllers (Update A)

    Modicon M580 Firmware All Versions installed with Modicon M580 Controller · Modicon M340 Firmware All Versions installed on Modicon M340 Controller · Modicon MC80 Firmware Versions prior to v1.80 installed on Modicon MC80 Controller (BMKC8020301) · +5 more

Full record on NVD

Fix

  1. Update Schneider-electric modicon m340 firmware to 3.01
  2. Vendor fix CISA ICSA-25-114-01 · 1 productVersion v1.80 of Modicon MC80 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-…
  3. Vendor fix CISA ICSA-25-114-01 · 1 productVersion sv2.90 of Modicon Momentum 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 v16.2 HF003 (https://www.se.com/ww/en/product-range/548-ecostruxure-control-exper…
  4. Vendor fix CISA ICSA-25-114-01 · 1 productVersion v15.1 of EcoStruxure Control Expert includes a fix for this vulnerability and is available for download here: https://www.se.com/ww/en/product-range/548-ecostruxure-control-expert-unity-pro/#software-and-firmware
  5. Mitigation from the vendor CISA ICSA-25-114-01 · 1 productTo mitigate the risks, users should immediately apply the following steps: • 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 recom…
  6. Mitigation from the vendor CISA ICSA-25-114-01 · 1 productTo mitigate the risks associated with Modbus weaknesses, users should immediately: • 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 t…
  7. Mitigation from the vendor CISA ICSA-25-114-01 · 1 productCustomers should immediately apply the following mitigations to reduce the risk of exploit: • Ensure to use simulator default panel option to make PLC simulator accessible only locally. • Modbus network connections are disabled by default on the PLC Simulator present in EcoStruxure Control Expe…

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
2019-05-22
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-fvc9-hg4x-m85q

Frequently asked questions

What is CVE-2018-7857?

A CWE-248: Uncaught Exception vulnerability exists in all versions of the Modicon M580, Modicon M340, Modicon Quantum, and Modicon Premium which could cause a possible Denial of Service when writing out of bounds variables to the controller over Modbus.

Is CVE-2018-7857 actively exploited?

Active exploitation of CVE-2018-7857 has not been confirmed. Its EPSS score was 1.6% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2018-7857?

CVE-2018-7857 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

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