A CWE-754: Improper Check for Unusual or Exceptional Conditions vulnerability exists in Modicon M580, Modicon M340, Modicon Quantum, Modicon
A CWE-754: Improper Check for Unusual or Exceptional Conditions vulnerability exists in Modicon M580, Modicon M340, Modicon Quantum, Modicon Premium (see security notification for specific versions) which could cause a Denial of Service when writing specific physical memory blocks using Modbus TCP.
- Published
- Jan 6, 2020
- Updated
- Jun 16, 2026
- EPSS
- 1.6% · 75th percentile
- CWE
- CWE-754
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Report tools
Action score
30
Monitor
Low priority for now.
- CVSS
- 30 / 40 · 7.5 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 1.6%
CISA SSVC decision
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
Vulnrichment: CISA's decision-tree inputs.
Affected systems
| Vendor | Product | CPE |
|---|---|---|
| schneider-electric | modicon m580 firmware | cpe:2.3:o:schneider-electric:modicon_m580_firmware |
| schneider-electric | modicon m580 | cpe:2.3:h:schneider-electric:modicon_m580 |
| schneider-electric | modicon m340 firmware | cpe:2.3:o:schneider-electric:modicon_m340_firmware |
| schneider-electric | modicon m340 | cpe:2.3:h:schneider-electric:modicon_m340 |
| schneider-electric | tsxh5744m firmware | cpe:2.3:o:schneider-electric:tsxh5744m_firmware |
| schneider-electric | tsxh5744m | cpe:2.3:h:schneider-electric:tsxh5744m |
| schneider-electric | tsxh5724m firmware | cpe:2.3:o:schneider-electric:tsxh5724m_firmware |
| schneider-electric | tsxh5724m | cpe:2.3:h:schneider-electric:tsxh5724m |
| schneider-electric | tsxp576634m firmware | cpe:2.3:o:schneider-electric:tsxp576634m_firmware |
| schneider-electric | tsxp576634m | cpe:2.3:h:schneider-electric:tsxp576634m_ |
| schneider-electric | tsxp57554m firmware | cpe:2.3:o:schneider-electric:tsxp57554m_firmware |
| schneider-electric | tsxp57554m | cpe:2.3:h:schneider-electric:tsxp57554m |
and 46 more
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- schneider-electric 140cpu65150 firmwarebefore 3.52
- schneider-electric 140cpu65160 firmwarebefore 3.52
- schneider-electric 140cpu65160s firmwarebefore 3.52
- schneider-electric 140cpu65260 firmwarebefore 3.52
- schneider-electric 140cpu65860 firmwarebefore 3.52
- schneider-electric 140cpu67060 firmwarebefore 3.52
- schneider-electric 140cpu67160 firmwarebefore 3.52
- schneider-electric 140cpu67160s firmwarebefore 3.52
- schneider-electric 140cpu67260 firmwarebefore 3.52
- schneider-electric 140cpu67261 firmwarebefore 3.52
- schneider-electric 140cpu67861 firmwarebefore 3.52
- schneider-electric modicon m340 firmwarebefore 3.01
- schneider-electric modicon m580 firmwarebefore 2.80
- schneider-electric tsxh5724m firmwarebefore 3.20
- schneider-electric tsxh5744m firmwarebefore 3.20
- schneider-electric tsxp57104m firmwarebefore 3.20
- schneider-electric tsxp57154m firmwarebefore 3.20
- schneider-electric tsxp571634m firmwarebefore 3.20
- schneider-electric tsxp57204m firmwarebefore 3.20
- schneider-electric tsxp57254m firmwarebefore 3.20
Versions reported by the vendor
Affected version ranges reported by the assigning authority (schneider). Independent of NVD's CPE analysis and usually ahead of it.
Schneider Electric SE Modicon M580, Modicon M340, Modicon Quantum, Modicon Premium (see security notification for specific versions)
- Modicon M580, Modicon M340, Modicon Quantum, Modicon Premium (see security notification for specific versions)affected
Same product
schneider-electric: all recordsOther highest-scoring records for the same primary product.
- CVE-2018-7842A CWE-290: Authentication Bypass by Spoofing vulnerability exists in all versions of the Modicon M580, Modicon M340, Modicon Quantum, and Mo50Plan
- CVE-2018-7846A CWE-501: Trust Boundary Violation vulnerability on connection to the Controller exists in all versions of the Modicon M580, Modicon M340, 48Plan
- CVE-2019-6848A CWE-755: Improper Handling of Exceptional Conditions vulnerability exists in Modicon M580 CPU (BMEx58*) and Modicon M580 communication mod44Plan
- CVE-2018-7847A CWE-284: Improper Access Control vulnerability exists in all versions of the Modicon M580, Modicon M340, Modicon Quantum, and Modicon Prem40Plan
- CVE-2019-6851A CWE-538: File and Directory Information Exposure vulnerability exists in Modicon M580, Modicon M340, Modicon Premium , Modicon Quantum (al39Monitor
- CVE-2019-6850A CWE-200: Information Exposure vulnerability exists in Modicon M580, Modicon BMENOC 0311, and Modicon BMENOC 0321, which could cause the di31Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
No fix version is recorded for this entry. Check the references for vendor advisories.
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- No account or password is required.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- none
- Integrity
- none
- Availability
- high · the service can be disrupted
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- None
- Integrity impact
- None
- Availability impact
- High
Weakness class (CWE)
CWE-754 · Improper Check for Unusual or Exceptional ConditionsCVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
MITRE has no CAPEC/ATT&CK mapping for this CWE.
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpChange log
No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.
References
Vendor advisories and official records. Exploit/PoC links are deliberately left out.