Security readout for executives and security teams
Plain-English summary
This issue affects Schneider Electric Modicon PLC families and a BMXNOR module. The vulnerable web service handling SOAP requests can encounter a buffer overflow. For executives, the concern is potential operational risk in industrial control environments, but the provided sources do not give severity scoring, impact detail, or confirmed exploitation.
Executive priority
Prioritize this where affected Schneider controllers support critical operations or have reachable web services. Without severity, exploit, or fix details in the supplied sources, urgency should be driven by asset criticality and network exposure.
Technical view
CVE-2018-7762 describes a buffer overflow condition in web services that process SOAP requests on Schneider Electric Modicon M340, Premium, Quantum PLCs, and BMXNOR0203 per the affected list. The bundle also references BMXNOR0200 in the description, so confirm exact module scope in Schneider advisory SEVD-2018-081-02.
Likely exposure
Exposure is most likely in OT networks using the listed Schneider Modicon PLCs or BMXNOR modules with web services reachable by operators, engineering workstations, or other network segments. Internet exposure is not stated in the sources and should not be assumed.
Exploitation context
No active exploitation is supported by the supplied sources; the KEV flag is false. The bundle provides no public exploit status, authentication requirement, reachable-port detail, or exploit maturity information.
Researcher notes
The source bundle is sparse: no CVSS, CWE, exploit status, authentication context, or patch text is included. The affected-product wording conflicts between BMXNOR0200 and BMXNOR0203, so vendor advisory confirmation is necessary before final scoping.
Mitigation direction
- Review Schneider advisory SEVD-2018-081-02 for official remediation and affected-scope detail.
- Inventory Modicon M340, Premium, Quantum PLCs, and BMXNOR modules in OT environments.
- Restrict access to PLC web services and SOAP interfaces to trusted management networks.
- Segment controller networks from corporate and internet-facing systems.
- Monitor vendor guidance before applying firmware or operational changes.
Validation and detection
- Confirm whether affected Schneider PLCs or BMXNOR modules are deployed.
- Check whether web services are enabled and reachable from non-OT networks.
- Validate current firmware and configuration against Schneider advisory guidance.
- Review firewall rules for unnecessary access to controller web services.
- Document any source inconsistency around BMXNOR0200 versus BMXNOR0203.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CVE-2018-7762 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://www.schneider-electric.com/en/download/document/SEVD-2018-081-02/CVE reference · x_refsource_CONFIRM
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.