Security readout for executives and security teams
Plain-English summary
CVE-2018-7824 affects Schneider Electric Modbus Serial Driver on Windows. The reported issue could let a controlled resource reference cause writes to files normally available only to SYSTEM or other important user files. That makes affected engineering or operations hosts important to identify, even though the source bundle does not provide CVSS, exploitability details, or confirmed active exploitation.
Executive priority
Prioritize assessment where affected Schneider drivers support operational technology systems. The business risk is unauthorized modification of sensitive files on Windows hosts. Urgency is high for exposed or production-adjacent systems, but exploitation status is not confirmed in the provided sources.
Technical view
The vulnerability is classified as CWE-610, Externally Controlled Reference to a Resource. Affected versions are the 64-bit Windows driver V3.17 IE 37 and prior, 32-bit Windows driver V2.17 IE 27 and prior, and Driver Suite V14.12 and prior. The documented impact is unauthorized file write capability affecting privileged or important files.
Likely exposure
Exposure is likely limited to Windows systems running the Schneider Electric Modbus Serial Driver or the affected Driver Suite versions, especially industrial engineering workstations, HMI, SCADA, or integration hosts using Schneider Modbus communications.
Exploitation context
The bundle does not show CISA KEV listing or any cited evidence of active exploitation. It also does not include exploit prerequisites, attack vector, or public exploit status. Treat exploitation evidence as incomplete, not confirmed.
Researcher notes
Key unknowns are attack vector, required privileges, user interaction, and fixed version details, which are not present in the bundle. Researchers should base validation on version evidence and Schneider’s advisory rather than assumptions about exploitability.
Mitigation direction
- Review Schneider advisory SEVD-2019-099-01 for official remediation guidance.
- Upgrade or remediate affected driver versions according to Schneider guidance.
- Prioritize hosts connected to operational networks or privileged Windows accounts.
- Limit exposure of affected engineering systems until vendor guidance is applied.
- Document unsupported systems requiring compensating controls.
Validation and detection
- Inventory Windows hosts for Schneider Electric Modbus Serial Driver installations.
- Record exact 64-bit driver, 32-bit driver, and Driver Suite versions.
- Compare installed versions against the affected version thresholds.
- Confirm remediation evidence against Schneider advisory SEVD-2019-099-01.
- Check whether any exposed host handles privileged or safety-relevant files.
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.
CWE-610: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2018-7824 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-2019-099-01/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.
Externally Controlled Reference to a Resource in Another Sphere
Externally Controlled Reference to a Resource in Another Sphere represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.