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No exploitation reportedFix available

CVE-2018-7847

No exploitation reported by the sources we read.

  • Published2019-05-22
  • WeaknessCWE-287

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-284: Improper Access Control vulnerability exists in all versions of the Modicon M580, Modicon M340, Modicon Quantum, and Modicon Premium which could cause denial of service or potential code execution by overwriting configuration settings of the controller over Modbus.

Timeline

dates in UTC
  1. 2019-05-2220:29CVE publishedNVD

Versions per branch

NVD
Schneider-electric modicon m340 firmwareversion to verify
BranchAffectedFixed in
—all versionsno fix published
Schneider-electric modicon m580 firmwareversion to verify
BranchAffectedFixed in
—all versionsno fix published
Schneider-electric modicon premium firmwareversion to verify
BranchAffectedFixed in
—all versionsno fix published

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 CISA2 products fixed · 5 known affected

    Schneider Electric Modicon Controllers (Update A)

    Modicon M580 Firmware Versions prior to v2.90 installed on Modicon M580 Controller · Modicon M340 Firmware Versions prior to v3.10 installed on Modicon M340 Controller · Modicon Quantum Firmware All Versions installed on Modicon Quantum Controller · +2 more

Full record on NVD

Fix

  1. Vendor fix CISA ICSA-25-114-01 · 1 productVersion 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-pr…
  2. Vendor fix CISA ICSA-25-114-01 · 1 productVersion 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-…
  3. Mitigation from the vendor CISA ICSA-25-114-01 · 1 productIt 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 t…
  4. Mitigation from the vendor CISA ICSA-25-114-01 · 1 productIt 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 follo…
  5. Mitigation from the vendor CISA ICSA-25-114-01 · 2 productsTo 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 …
  6. Mitigation from the vendor CISA ICSA-25-114-01 · 1 productTo 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 us…

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:H/I:H/A:H
Published
2019-05-22
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-frc4-4hp9-9xxf

Frequently asked questions

What is CVE-2018-7847?

A CWE-284: Improper Access Control vulnerability exists in all versions of the Modicon M580, Modicon M340, Modicon Quantum, and Modicon Premium which could cause denial of service or potential code execution by overwriting configuration settings of the controller over Modbus.

Is CVE-2018-7847 actively exploited?

Active exploitation of CVE-2018-7847 has not been confirmed. Its EPSS score was 3.8% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2018-7847?

CVE-2018-7847 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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