Improper handling of exceptional conditions in Modicon M580, Modicon M340, and Modicon…
Priority LOW 24CWE-755Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- High
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA.
Summary
A CWE-755: Improper Handling of Exceptional Conditions vulnerability exists in Modicon M580 with firmware (version prior to V3.10), Modicon M340 (all firmware versions), and Modicon BMxCRA and 140CRA modules (all firmware versions), which could cause a Denial of Service attack on the PLC when upgrading the controller with an empty firmware package using FTP protocol.
Why it matters now
EPSS 0.00959 61st percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | Modicon M580, Modicon M340, and Modicon BMxCRA / 140CRA modules (see notification for version info) | Modicon M580, Modicon M340, and Modicon BMxCRA / 140CRA modules (see notification for version info) | — | No fix listed | CNA |
- Modicon M580, Modicon M340, and Modicon BMxCRA / 140CRA modules (see notification for version info) Vendor— Affected Modicon M580, Modicon M340, and Modicon BMxCRA / 140CRA modules (see notification for version info) Fixed in — No fix listed CNA
CPE configurations NVD · 8
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:schneider-electric:modicon_m580_firmware:*:*:*:*:*:*:*:* | all versions | Vulnerable | Schneider Electric |
| cpe:2.3:h:schneider-electric:modicon_m580:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Schneider Electric |
| cpe:2.3:o:schneider-electric:modicon_m340_firmware:*:*:*:*:*:*:*:* | all versions | Vulnerable | Schneider Electric |
| cpe:2.3:h:schneider-electric:modicon_m340:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Schneider Electric |
| cpe:2.3:o:schneider-electric:modicon_bmxcra_firmware:*:*:*:*:*:*:*:* | all versions | Vulnerable | Schneider Electric |
| cpe:2.3:h:schneider-electric:modicon_bmxcra:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Schneider Electric |
| cpe:2.3:o:schneider-electric:modicon_140cra_firmware:*:*:*:*:*:*:*:* | all versions | Vulnerable | Schneider Electric |
| cpe:2.3:h:schneider-electric:modicon_140cra:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Schneider Electric |
- cpe:2.3:o:schneider-electric:modicon_m580_firmware:*:*:*:*:*:*:*:* Versions all versions Vulnerable ·Schneider Electric
- cpe:2.3:h:schneider-electric:modicon_m580:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Schneider Electric
- cpe:2.3:o:schneider-electric:modicon_m340_firmware:*:*:*:*:*:*:*:* Versions all versions Vulnerable ·Schneider Electric
- cpe:2.3:h:schneider-electric:modicon_m340:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Schneider Electric
- cpe:2.3:o:schneider-electric:modicon_bmxcra_firmware:*:*:*:*:*:*:*:* Versions all versions Vulnerable ·Schneider Electric
- cpe:2.3:h:schneider-electric:modicon_bmxcra:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Schneider Electric
- cpe:2.3:o:schneider-electric:modicon_140cra_firmware:*:*:*:*:*:*:*:* Versions all versions Vulnerable ·Schneider Electric
- cpe:2.3:h:schneider-electric:modicon_140cra:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Schneider Electric
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2019-6843
- 2026-10-03 Alias added: GHSA-4pf4-m389-3pxh
References
More Schneider Electric Modicon 140cra Firmware vulnerabilities
- TI-2019-04874 Improper handling of exceptional conditions in Modicon M580, Modicon M340, and Modicon… CVSS 3.1MEDIUM 4.9
- TI-2019-04879 Cleartext transmission of sensitive information in Modicon M580, Modicon M340, Modicon… CVSS 3.1MEDIUM 6.5
- TI-2019-04880 Improper handling of exceptional conditions in Modicon M580, Modicon M340, and Modicon… CVSS 3.1MEDIUM 4.9
- TI-2019-04877 Improper handling of exceptional conditions in Modicon M580, Modicon M340, and Modicon… CVSS 3.1MEDIUM 4.9
- TI-2019-04875 Improper handling of exceptional conditions in Modicon M580, Modicon M340, and Modicon… CVSS 3.1MEDIUM 4.9
Sources
- CVE-2019-6843 · CVE Program
- CVE-2019-6843 · NVD
- FIRST EPSS
- GHSA-4pf4-m389-3pxh · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences