CVE-2020-7539
A CWE-754 Improper Check for Unusual or Exceptional Conditions vulnerability exists in the Web...
A CWE-754 Improper Check for Unusual or Exceptional Conditions vulnerability exists in the Web Server on Modicon M340, Legacy Offers Modicon Quantum and Modicon Premium and associated Communication Modules (see security notification for affected versions), that could cause a denial of service vulnerability when a specially crafted packet is sent to the controller over HTTP.
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 the Web Server on Modicon M340, Legacy Offers Modicon Quantum and Modicon Premium and associated Communication Modules (see security notification for affected versions), that could cause a denial of service vulnerability when a specially crafted packet is sent to the controller over HTTP.
- Record
CVE-2020-7539- 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 the Web Server on Modicon M340, Legacy Offers Modicon Quantum and Modicon Premium and associated Communication Modules (see security notification for affected versions), that could cause a denial of service vulnerability when a specially crafted packet is sent to the controller over HTTP.
- Record
CVE-2020-7539- Weakness
- CWE-754
- Updated
- 2026-11-02
EUVDEUVD-2020-28664 No score
A CWE-754 Improper Check for Unusual or Exceptional Conditions vulnerability exists in the Web Server on Modicon M340, Legacy Offers Modicon Quantum and Modicon Premium and associated Communication Modules (see security notification for affected versions), that could cause a denial of service vulnerability when a specially crafted packet is sent to the controller over HTTP.
- Record
EUVD-2020-28664- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-x6hc-2whc-99qv No score
A CWE-754 Improper Check for Unusual or Exceptional Conditions vulnerability exists in the Web...
A CWE-754 Improper Check for Unusual or Exceptional Conditions vulnerability exists in the Web Server on Modicon M340, Legacy Offers Modicon Quantum and Modicon Premium and associated Communication Modules (see security notification for affected versions), that could cause a denial of service vulnerability when a specially crafted packet is sent to the controller over HTTP.
- Record
GHSA-x6hc-2whc-99qv- Weakness
- CWE-754
- Updated
- 2026-11-02
Affected products
- schneider-electric 140cpu65150 firmware
- schneider-electric 140noc77101 firmware
- schneider-electric 140noc78000 firmware
- schneider-electric 140noc78100 firmware
- schneider-electric 140noe77111 firmware
- schneider-electric bmxnoc0401 firmware
- schneider-electric bmxnoe0100 firmware
- schneider-electric bmxnoe0110 firmware
- schneider-electric modicon m340 bmxp341000 firmware
- schneider-electric modicon m340 bmxp342000 firmware
- schneider-electric modicon m340 bmxp3420102 firmware
- schneider-electric modicon m340 bmxp3420102cl firmware
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- schneider-electric modicon m340 bmxp342020 firmware
- schneider-electric modicon m340 bmxp3420302 firmware
- schneider-electric modicon m340 bmxp3420302cl firmware
- schneider-electric tsxety4103 firmware
- schneider-electric tsxety5103 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-2020-7539 is a high vulnerability (CVSS 7.5) in Schneider-electric 140cpu65150 Firmware, published December 11, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.20%, the 68th percentile. No source names a fixed version.