Security readout for executives and security teams
Plain-English summary
This vulnerability affects Omron CS, CJ, and NX1P2 series PLCs. A remote, unauthenticated attacker could reach a PLC lock function that should not be externally accessible, creating risk to industrial process availability and some confidentiality and integrity impact.
Executive priority
Treat this as a high-priority OT exposure review, especially for sites with remote access into PLC networks. Business urgency comes from possible process disruption rather than confirmed active exploitation in the supplied sources.
Technical view
CVE-2019-18269 is a CWE-412 unrestricted externally accessible lock issue in listed Omron PLC families, reported as affecting all versions in the supplied record. CVSS 3.1 is 8.6 with network attack vector, low complexity, no privileges, and no user interaction.
Likely exposure
Exposure is most relevant where affected Omron PLCs are reachable over routable plant, enterprise, remote-access, or Internet-facing networks. The source bundle does not identify specific ports, protocols, deployment patterns, or compensating controls.
Exploitation context
The supplied data does not show CISA KEV listing or active exploitation. The CVSS vector indicates remote unauthenticated exploitability and high availability impact, but the bundle does not provide exploit maturity, observed attacks, or public proof-of-concept evidence.
Researcher notes
The bundle is sparse and contains inconsistent affected-product metadata, listing all versions while also showing defaultStatus as unaffected. Use the CVE, CISA advisory, and Omron PDF as primary sources before making asset-specific conclusions.
Mitigation direction
- Review Omron’s advisory for product-specific remediation guidance.
- Review CISA ICSA-19-346-02 for recommended defensive actions.
- Identify affected CS, CJ, and NX1P2 PLC assets.
- Remove unnecessary external reachability to affected PLCs.
- Restrict PLC access to trusted management networks only.
- Prioritize compensating controls where patch guidance is unavailable.
Validation and detection
- Inventory Omron CS, CJ, and NX1P2 PLCs in production.
- Confirm whether any affected PLC is reachable from untrusted networks.
- Review firewall, VPN, and remote-access paths to PLC networks.
- Check vendor advisories for any model-specific status or updates.
- Document compensating controls for each exposed PLC.
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-412: 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-2019-18269 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
- High
- CVSS
- 8.6 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
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.
SSVC decision data
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H3.94.7CISA-ADPVulnerability scoring details
Base CVSS 3.1 score
8.6HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://www.us-cert.gov/ics/advisories/icsa-19-346-02CVE reference, icscert · x_refsource_MISC
- https://www.omron-cxone.com/security/2019-12-06_PLC_EN.pdfCVE reference, icscert
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.
Unrestricted Externally Accessible Lock
Unrestricted Externally Accessible Lock represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.