Security readout for executives and security teams
Plain-English summary
This CVE describes a buffer overflow in Schneider Electric Modicon PLC families and the BMXNOR0200 module. For executives, the concern is potential disruption or unsafe behavior in operational technology environments. The provided sources do not include CVSS, confirmed impact details, exploit status, or a named fix.
Executive priority
Treat this as an OT risk triage item, not a confirmed emergency. Validate exposure promptly because PLC vulnerabilities can affect operational continuity, but evidence is insufficient to claim active exploitation or define business impact precisely.
Technical view
The issue is a buffer overflow caused by copying bytes based on the source string length instead of the destination buffer size. Affected products are listed as all Modicon M340, Premium, Quantum PLCs and BMXNOR0200. The bundle does not provide attack prerequisites, reachable services, proof of exploitation, or remediation specifics.
Likely exposure
Exposure is limited to organizations using the listed Schneider Electric Modicon PLCs or BMXNOR0200 modules. Actual risk depends on installed versions, network reachability, and Schneider advisory details not included in the bundle.
Exploitation context
The source bundle does not show active exploitation. CISA KEV status is false, and no cited source in the bundle confirms public exploitation, weaponization, or attacker use.
Researcher notes
The bundle identifies the vulnerable products and root coding error but lacks CVSS, CWE, protocol, prerequisites, and remediation details. Analysis should stay anchored to Schneider advisory SEVD-2018-081-02 and avoid assumptions about exploitability.
Mitigation direction
- Review Schneider Electric advisory SEVD-2018-081-02 for product-specific remediation.
- Inventory Modicon M340, Premium, Quantum PLCs, and BMXNOR0200 modules.
- Restrict unnecessary access to affected industrial controllers pending vendor guidance.
- Prioritize remediation planning for internet-exposed or cross-zone reachable OT assets.
Validation and detection
- Confirm whether affected Schneider Electric product families exist in the OT inventory.
- Map network paths to affected PLCs and communication modules.
- Check Schneider advisory SEVD-2018-081-02 for applicable versions and guidance.
- Record compensating controls where vendor remediation is unavailable or pending.
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-2018-7759 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.