Security readout for executives and security teams
Plain-English summary
Moxa MXView Series 3.1.8 installs with unsafe file permissions. A local attacker could abuse files run by the MXView service to gain Windows NT SYSTEM-level control. This is serious on monitoring hosts because compromise can expose sensitive operational data and undermine system integrity.
Executive priority
Treat this as urgent for any MXView 3.1.8 deployment, especially in OT or infrastructure monitoring environments. It is not described as remotely exploitable in the supplied sources, but local compromise could become full host compromise.
Technical view
CVE-2020-13537 is a CWE-276 local privilege elevation issue in MXView 3.1.8. MXViewService runs as NT SYSTEM and executes Node.js scripts and the mosquitto executable. The source says an attacker can add code to a script or replace a binary, depending on vector.
Likely exposure
Exposure is limited to systems running Moxa MXView Series 3.1.8. The vulnerability is local, so risk is highest where untrusted users, shared administration, remote desktop access, or compromised accounts can access the MXView host.
Exploitation context
The provided bundle does not show CISA KEV listing or active exploitation. CVSS 3.0 is 9.3 with local attack vector, low complexity, no privileges, no user interaction, and high confidentiality, integrity, and availability impact.
Researcher notes
Evidence supports a local privilege escalation caused by permissive filesystem permissions. The bundle does not provide patch version details, confirmed exploitation, or broader affected versions. Avoid assuming other Moxa products or MXView versions are affected without vendor confirmation.
Mitigation direction
- Identify and prioritize MXView Series 3.1.8 installations.
- Check Moxa and Talos guidance for supported fixes or mitigations.
- Restrict local and remote interactive access to MXView hosts.
- Review write permissions on MXView installation paths.
- Monitor MXView service paths for unexpected file changes.
Validation and detection
- Confirm the installed MXView version on monitoring hosts.
- Inventory Windows hosts running MXViewService.
- Review filesystem ACLs for MXView scripts and binaries.
- Check whether non-administrative users can modify installation files.
- Look for unexplained changes to Node.js scripts or mosquitto binaries.
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-276: Exact CWE lookup
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Open ATT&CK lookupCVE-2020-13537 mapping review
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Open ATT&CK lookup- Severity
- Critical
- CVSS
- 9.3 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/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.
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:3.0/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H2.56Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
9.3CriticalVector: CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://talosintelligence.com/vulnerability_reports/TALOS-2020-1148CVE 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.
Incorrect Default Permissions
Incorrect Default Permissions represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.