CVE-2020-7537
A CWE-754: Improper Check for Unusual or Exceptional Conditions vulnerability exists in Modicon...
A CWE-754: Improper Check for Unusual or Exceptional Conditions vulnerability exists in Modicon M580, Modicon M340, Legacy Controllers Modicon Quantum & Modicon Premium (see security notifications for affected versions), that could cause denial of service when a specially crafted Read Physical Memory request over Modbus is sent to the controller.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
A CWE-754: Improper Check for Unusual or Exceptional Conditions vulnerability exists in Modicon M580, Modicon M340, Legacy Controllers Modicon Quantum & Modicon Premium (see security notifications for affected versions), that could cause denial of service when a specially crafted Read Physical Memory request over Modbus is sent to the controller.
- Record
CVE-2020-7537- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - CVSS 2.0
- 5.0 Medium
AV:N/AC:L/Au:N/C:N/I:N/A:P - Weakness
- CWE-754
- Updated
- 2026-11-02
CVE List No score
A CWE-754: Improper Check for Unusual or Exceptional Conditions vulnerability exists in Modicon M580, Modicon M340, Legacy Controllers Modicon Quantum & Modicon Premium (see security notifications for affected versions), that could cause denial of service when a specially crafted Read Physical Memory request over Modbus is sent to the controller.
- Record
CVE-2020-7537- Weakness
- CWE-754
- Updated
- 2026-11-02
EUVDEUVD-2020-28662 No score
A CWE-754: Improper Check for Unusual or Exceptional Conditions vulnerability exists in Modicon M580, Modicon M340, Legacy Controllers Modicon Quantum & Modicon Premium (see security notifications for affected versions), that could cause denial of service when a specially crafted Read Physical Memory request over Modbus is sent to the controller.
- Record
EUVD-2020-28662- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-9vj3-52fm-gw3x No score
A CWE-754: Improper Check for Unusual or Exceptional Conditions vulnerability exists in Modicon...
A CWE-754: Improper Check for Unusual or Exceptional Conditions vulnerability exists in Modicon M580, Modicon M340, Legacy Controllers Modicon Quantum & Modicon Premium (see security notifications for affected versions), that could cause denial of service when a specially crafted Read Physical Memory request over Modbus is sent to the controller.
- Record
GHSA-9vj3-52fm-gw3x- Weakness
- CWE-754
- Updated
- 2026-11-02
Affected products
- schneider-electric modicon m340 bmxp341000 firmware
- schneider-electric modicon m340 bmxp342000 firmware
- schneider-electric modicon m340 bmxp3420102 firmware
- schneider-electric modicon m340 bmxp3420102cl firmware
- schneider-electric modicon m340 bmxp342020 firmware
- schneider-electric modicon m340 bmxp3420302 firmware
- schneider-electric modicon m340 bmxp3420302cl firmware
- schneider-electric modicon m580 bmep581020 firmware
- schneider-electric modicon m580 bmep582020 firmware
- schneider-electric modicon m580 bmep582040 firmware
- schneider-electric modicon m580 bmep583020 firmware
- schneider-electric modicon m580 bmep583040 firmware
Show 7 moreShow less
- schneider-electric modicon m580 bmep584020 firmware
- schneider-electric modicon m580 bmep584040 firmware
- schneider-electric modicon m580 bmep585040 firmware
- schneider-electric modicon m580 bmep586040 firmware
- schneider-electric tsxp574634 firmware
- schneider-electric tsxp575634 firmware
- schneider-electric tsxp576634 firmware
History
| Recorded | Changed | Sources |
|---|---|---|
| facts | ||
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2020-7537 is a high vulnerability (CVSS 7.5) in Schneider-electric Modicon M340 Bmxp341000 Firmware, published December 11, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.40%, the 72nd percentile. No source names a fixed version.