Improper check for unusual conditions in Web Server on Modicon M340, Legacy Offers…
Priority MEDIUM 41CWE-754Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- 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 · CISA ADP. Fix status from CNA.
Summary
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 denial of HTTP and FTP services when a series of specially crafted requests is sent to the controller over HTTP.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.01099 65th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | Web Server on Modicon M340, Legacy Offers Modicon Quantum and Modicon Premium and associated Communication Modules (see security notification for affected versions) | Web Server on Modicon M340, Legacy Offers Modicon Quantum and Modicon Premium and associated Communication Modules (see security notification for affected versions) | — | No fix listed | CNA |
- Web Server on Modicon M340, Legacy Offers Modicon Quantum and Modicon Premium and associated Communication Modules (see security notification for affected versions) Vendor— Affected Web Server on Modicon M340, Legacy Offers Modicon Quantum and Modicon Premium and associated Communication Modules (see security notification for affected versions) Fixed in — No fix listed CNA
CPE configurations NVD · 38
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:schneider-electric:modicon_m340_bmxp341000_firmware:*:*:*:*:*:*:*:* | before 3.30 | Vulnerable | Schneider Electric |
| cpe:2.3:h:schneider-electric:modicon_m340_bmxp341000:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Schneider Electric |
| cpe:2.3:o:schneider-electric:modicon_m340_bmxp342000_firmware:*:*:*:*:*:*:*:* | before 3.30 | Vulnerable | Schneider Electric |
| cpe:2.3:h:schneider-electric:modicon_m340_bmxp342000:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Schneider Electric |
| cpe:2.3:o:schneider-electric:modicon_m340_bmxp3420102_firmware:*:*:*:*:*:*:*:* | before 3.30 | Vulnerable | Schneider Electric |
| cpe:2.3:h:schneider-electric:modicon_m340_bmxp3420102:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Schneider Electric |
| cpe:2.3:o:schneider-electric:modicon_m340_bmxp3420102cl_firmware:*:*:*:*:*:*:*:* | before 3.30 | Vulnerable | Schneider Electric |
| cpe:2.3:h:schneider-electric:modicon_m340_bmxp3420102cl:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Schneider Electric |
| cpe:2.3:o:schneider-electric:modicon_m340_bmxp342020_firmware:*:*:*:*:*:*:*:* | before 3.30 | Vulnerable | Schneider Electric |
| cpe:2.3:h:schneider-electric:modicon_m340_bmxp342020:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Schneider Electric |
- cpe:2.3:o:schneider-electric:modicon_m340_bmxp341000_firmware:*:*:*:*:*:*:*:* Versions before 3.30 Vulnerable ·Schneider Electric
- cpe:2.3:h:schneider-electric:modicon_m340_bmxp341000:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Schneider Electric
- cpe:2.3:o:schneider-electric:modicon_m340_bmxp342000_firmware:*:*:*:*:*:*:*:* Versions before 3.30 Vulnerable ·Schneider Electric
- cpe:2.3:h:schneider-electric:modicon_m340_bmxp342000:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Schneider Electric
- cpe:2.3:o:schneider-electric:modicon_m340_bmxp3420102_firmware:*:*:*:*:*:*:*:* Versions before 3.30 Vulnerable ·Schneider Electric
- cpe:2.3:h:schneider-electric:modicon_m340_bmxp3420102:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Schneider Electric
- cpe:2.3:o:schneider-electric:modicon_m340_bmxp3420102cl_firmware:*:*:*:*:*:*:*:* Versions before 3.30 Vulnerable ·Schneider Electric
- cpe:2.3:h:schneider-electric:modicon_m340_bmxp3420102cl:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Schneider Electric
- cpe:2.3:o:schneider-electric:modicon_m340_bmxp342020_firmware:*:*:*:*:*:*:*:* Versions before 3.30 Vulnerable ·Schneider Electric
- cpe:2.3:h:schneider-electric:modicon_m340_bmxp342020:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Schneider Electric
Show 28 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:schneider-electric:modicon_m340_bmxp3420302_firmware:*:*:*:*:*:*:*:* | before 3.30 | Vulnerable | Schneider Electric |
| cpe:2.3:h:schneider-electric:modicon_m340_bmxp3420302:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Schneider Electric |
| cpe:2.3:o:schneider-electric:modicon_m340_bmxp3420302cl_firmware:*:*:*:*:*:*:*:* | before 3.30 | Vulnerable | Schneider Electric |
| cpe:2.3:h:schneider-electric:modicon_m340_bmxp3420302cl:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Schneider Electric |
| cpe:2.3:o:schneider-electric:bmxnoe0100_firmware:*:*:*:*:*:*:*:* | before 3.4 | Vulnerable | Schneider Electric |
| cpe:2.3:h:schneider-electric:bmxnoe0100:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Schneider Electric |
| cpe:2.3:o:schneider-electric:bmxnoe0110_firmware:*:*:*:*:*:*:*:* | before 6.6 | Vulnerable | Schneider Electric |
| cpe:2.3:h:schneider-electric:bmxnoe0110:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Schneider Electric |
| cpe:2.3:o:schneider-electric:bmxnoc0401_firmware:*:*:*:*:*:*:*:* | all versions | Vulnerable | Schneider Electric |
| cpe:2.3:h:schneider-electric:bmxnoc0401:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Schneider Electric |
| cpe:2.3:o:schneider-electric:140noe77111_firmware:*:*:*:*:*:*:*:* | before 7.3 | Vulnerable | Schneider Electric |
| cpe:2.3:h:schneider-electric:140noe77111:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Schneider Electric |
| cpe:2.3:o:schneider-electric:140noc78100_firmware:*:*:*:*:*:*:*:* | all versions | Vulnerable | Schneider Electric |
| cpe:2.3:h:schneider-electric:140noc78100:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Schneider Electric |
| cpe:2.3:o:schneider-electric:140noc78000_firmware:*:*:*:*:*:*:*:* | all versions | Vulnerable | Schneider Electric |
| cpe:2.3:h:schneider-electric:140noc78000:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Schneider Electric |
| cpe:2.3:o:schneider-electric:140cpu65150_firmware:*:*:*:*:*:*:*:* | all versions | Vulnerable | Schneider Electric |
| cpe:2.3:h:schneider-electric:140cpu65150:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Schneider Electric |
| cpe:2.3:o:schneider-electric:tsxety4103_firmware:*:*:*:*:*:*:*:* | all versions | Vulnerable | Schneider Electric |
| cpe:2.3:h:schneider-electric:tsxety4103:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Schneider Electric |
| cpe:2.3:o:schneider-electric:tsxety5103_firmware:*:*:*:*:*:*:*:* | all versions | Vulnerable | Schneider Electric |
| cpe:2.3:h:schneider-electric:tsxety5103:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Schneider Electric |
| cpe:2.3:o:schneider-electric:tsxp574634_firmware:*:*:*:*:*:*:*:* | all versions | Vulnerable | Schneider Electric |
| cpe:2.3:h:schneider-electric:tsxp574634:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Schneider Electric |
| cpe:2.3:o:schneider-electric:tsxp575634_firmware:*:*:*:*:*:*:*:* | all versions | Vulnerable | Schneider Electric |
| cpe:2.3:h:schneider-electric:tsxp575634:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Schneider Electric |
| cpe:2.3:o:schneider-electric:tsxp576634_firmware:*:*:*:*:*:*:*:* | all versions | Vulnerable | Schneider Electric |
| cpe:2.3:h:schneider-electric:tsxp576634:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Schneider Electric |
- cpe:2.3:o:schneider-electric:modicon_m340_bmxp3420302_firmware:*:*:*:*:*:*:*:* Versions before 3.30 Vulnerable ·Schneider Electric
- cpe:2.3:h:schneider-electric:modicon_m340_bmxp3420302:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Schneider Electric
- cpe:2.3:o:schneider-electric:modicon_m340_bmxp3420302cl_firmware:*:*:*:*:*:*:*:* Versions before 3.30 Vulnerable ·Schneider Electric
- cpe:2.3:h:schneider-electric:modicon_m340_bmxp3420302cl:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Schneider Electric
- cpe:2.3:o:schneider-electric:bmxnoe0100_firmware:*:*:*:*:*:*:*:* Versions before 3.4 Vulnerable ·Schneider Electric
- cpe:2.3:h:schneider-electric:bmxnoe0100:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Schneider Electric
- cpe:2.3:o:schneider-electric:bmxnoe0110_firmware:*:*:*:*:*:*:*:* Versions before 6.6 Vulnerable ·Schneider Electric
- cpe:2.3:h:schneider-electric:bmxnoe0110:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Schneider Electric
- cpe:2.3:o:schneider-electric:bmxnoc0401_firmware:*:*:*:*:*:*:*:* Versions all versions Vulnerable ·Schneider Electric
- cpe:2.3:h:schneider-electric:bmxnoc0401:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Schneider Electric
- cpe:2.3:o:schneider-electric:140noe77111_firmware:*:*:*:*:*:*:*:* Versions before 7.3 Vulnerable ·Schneider Electric
- cpe:2.3:h:schneider-electric:140noe77111:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Schneider Electric
- cpe:2.3:o:schneider-electric:140noc78100_firmware:*:*:*:*:*:*:*:* Versions all versions Vulnerable ·Schneider Electric
- cpe:2.3:h:schneider-electric:140noc78100:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Schneider Electric
- cpe:2.3:o:schneider-electric:140noc78000_firmware:*:*:*:*:*:*:*:* Versions all versions Vulnerable ·Schneider Electric
- cpe:2.3:h:schneider-electric:140noc78000:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Schneider Electric
- cpe:2.3:o:schneider-electric:140cpu65150_firmware:*:*:*:*:*:*:*:* Versions all versions Vulnerable ·Schneider Electric
- cpe:2.3:h:schneider-electric:140cpu65150:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Schneider Electric
- cpe:2.3:o:schneider-electric:tsxety4103_firmware:*:*:*:*:*:*:*:* Versions all versions Vulnerable ·Schneider Electric
- cpe:2.3:h:schneider-electric:tsxety4103:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Schneider Electric
- cpe:2.3:o:schneider-electric:tsxety5103_firmware:*:*:*:*:*:*:*:* Versions all versions Vulnerable ·Schneider Electric
- cpe:2.3:h:schneider-electric:tsxety5103:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Schneider Electric
- cpe:2.3:o:schneider-electric:tsxp574634_firmware:*:*:*:*:*:*:*:* Versions all versions Vulnerable ·Schneider Electric
- cpe:2.3:h:schneider-electric:tsxp574634:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Schneider Electric
- cpe:2.3:o:schneider-electric:tsxp575634_firmware:*:*:*:*:*:*:*:* Versions all versions Vulnerable ·Schneider Electric
- cpe:2.3:h:schneider-electric:tsxp575634:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Schneider Electric
- cpe:2.3:o:schneider-electric:tsxp576634_firmware:*:*:*:*:*:*:*:* Versions all versions Vulnerable ·Schneider Electric
- cpe:2.3:h:schneider-electric:tsxp576634:-:*:*:*:*:*:*:* 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-2020-7549
- 2026-10-03 Alias added: GHSA-mg3m-w94w-vr47
References
More Schneider Electric 140cpu65150 Firmware vulnerabilities
- TI-2018-05250 Hard-coded credentials in Schneider Electric Modicon Premium, Modicon Quantum, Modicon… CVSS 3.0CRITICAL 9.8
- TI-2020-06063 Missing authentication in Web Server on Modicon M340, Legacy Offers Modicon Quantum and… CVSS 3.1CRITICAL 9.8
- TI-2018-05604 Improper input validation in Schneider Electric Modicon M340, Modicon Premium, Modicon… CVSS 3.0CRITICAL 9.8
- TI-2018-05251 Vulnerable hash algorithms exists in Schneider Electric's Modicon Premium, Modicon… CVSS 3.0CRITICAL 9.8
- TI-2018-05603 Improper authentication in Schneider Electric Modicon M340, Modicon Premium, Modicon… CVSS 3.0CRITICAL 9.8
- TI-2018-05249 Out-of-bounds write in Schneider Electric Modicon Quantum CVSS 3.0HIGH 8.8
Sources
- CVE-2020-7549 · CVE Program
- CVE-2020-7549 · NVD
- FIRST EPSS
- GHSA-mg3m-w94w-vr47 · 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