Security readout for executives and security teams
Plain-English summary
This vulnerability can crash affected Schneider Modicon controllers when they receive certain invalid Modbus memory-read requests. For operations leaders, the main risk is loss of controller availability, which can disrupt industrial processes using these PLC families.
Executive priority
Treat this as a high operational availability risk where affected controllers support production, safety-adjacent, or critical facility processes. Prioritize asset identification and vendor-guided remediation over broad assumptions.
Technical view
CVE-2018-7853 is a CWE-248 uncaught exception issue affecting all versions of Modicon M580, M340, Quantum, and Premium controllers. The reported impact is denial of service when invalid physical memory blocks are read over Modbus.
Likely exposure
Exposure is most likely where affected Modicon controllers accept Modbus traffic from plant networks, remote access paths, or improperly segmented environments. The source bundle does not identify internet exposure levels.
Exploitation context
The CVE is not listed as KEV in the supplied bundle, and no source evidence here confirms active exploitation. The reported trigger is malformed or invalid Modbus memory-read behavior, but exploit procedure details are intentionally omitted.
Researcher notes
Evidence is limited to the CVE description and linked Schneider and Talos references. No CVSS vector, patch version, or confirmed exploitation status is included in the supplied bundle.
Mitigation direction
- Review Schneider advisory SEVD-2019-134-11 for official remediation guidance.
- Confirm whether supported firmware or configuration guidance applies to each controller family.
- Restrict Modbus access to trusted industrial management paths under existing network policy.
- Prioritize segmentation review for controllers reachable from remote access or business networks.
Validation and detection
- Inventory Modicon M580, M340, Quantum, and Premium controllers.
- Confirm which assets accept Modbus traffic and from where.
- Check whether Schneider guidance has been applied to each affected controller.
- Review operational logs for unexplained controller denial-of-service events.
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-2018-7853 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-2019-134-11/CVE reference · x_refsource_MISC
- https://www.talosintelligence.com/vulnerability_reports/TALOS-2019-0764CVE reference · x_refsource_MISC
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.