Security readout for executives and security teams
Plain-English summary
Moxa MXView Series 3.1.8 can allow a local attacker to gain Windows SYSTEM-level control because installed files are writable in unsafe ways. This matters most where MXView runs on monitoring or operations workstations, because compromise of that host can undermine confidentiality, integrity, and availability of the management environment.
Executive priority
Treat this as high priority where MXView 3.1.8 is deployed on operational monitoring systems. It is local-only, but the potential impact is full host control under SYSTEM, which can weaken trust in the management environment.
Technical view
The flaw is CWE-276: incorrect default file permissions. MXViewService runs as NT SYSTEM and executes Node.js scripts for application functionality. Talos reports an attacker can add code to a script or replace a binary, leading to local privilege elevation. The CVSS vector is local, low complexity, no privileges, no user interaction, scope changed, high impact.
Likely exposure
Exposure appears limited to hosts running Moxa MXView Series 3.1.8. The source indicates a local Windows privilege-escalation condition, so internet exposure is not the primary driver; risk depends on local access paths to the MXView host.
Exploitation context
The provided bundle does not show CISA KEV listing or confirmed active exploitation. The vulnerability is still serious because successful abuse can elevate a local attacker to NT SYSTEM through trusted MXView service execution behavior.
Researcher notes
Evidence supports a local privilege escalation through unsafe filesystem permissions and privileged service execution. The bundle names MXView Series 3.1.8 only. No public-source evidence in the bundle confirms active exploitation, affected later versions, or a specific vendor patch.
Mitigation direction
- Identify all installations of Moxa MXView Series 3.1.8.
- Check Moxa or Talos guidance for a supported fix or upgrade path.
- Restrict interactive and remote local access to MXView hosts.
- Harden write permissions on MXView installation paths per vendor guidance.
- Monitor MXView scripts, binaries, and service directories for unauthorized changes.
Validation and detection
- Inventory MXView versions on operations and monitoring workstations.
- Review MXView installation directory permissions for unexpected write access.
- Confirm MXViewService runs as NT SYSTEM on affected hosts.
- Check file integrity for Node.js scripts and service-launched binaries.
- Review endpoint logs for suspicious local changes under MXView paths.
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
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-2020-13536 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
- 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.