Security readout for executives and security teams
CVE-2018-20026 affects CODESYS V3 products before V3.5.14.0. The issue is improper communication address filtering, which can matter in operational technology environments where controller communications should be tightly restricted. The public bundle does not provide CVSS, exploit details, or confirmed exploitation. Exposure is likely limited to organizations running CODESYS V3 products earlier than V3.5.14.0, especially in industrial or control environments. Risk depends on whether relevant CODESYS communication paths are reachable from untrusted networks. Treat as an OT exposure assessment item, not a confirmed emergency from the supplied evidence. Prioritize organizations with CODESYS V3 before V3.5.14.0 on reachable industrial networks. Mitigation focus: Inventory CODESYS V3 deployments and identify versions earlier than V3.5.14.0.; Review CODESYS, Kaspersky ICS CERT, and CISA advisory guidance before changing production systems.; Prioritize migration away from affected pre-V3.5.14.0 versions where vendor guidance supports it..
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
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ATT&CK lookup starting points
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CVE-2018-20026 mapping review
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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://ics-cert.kaspersky.com/advisories/klcert-advisories/2018/12/19/klcert-18-036-codesys-control-v3-improper-communication-address-filtering/CVE reference · x_refsource_MISC
- https://ics-cert.us-cert.gov/advisories/ICSA-18-352-04CVE 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.