Security readout for executives and security teams
Plain-English summary
This CVE describes an unauthenticated remote weakness in ECOA building automation controllers that could let an attacker write files through path traversal and potentially run code on the device. The business risk is high where these controllers are exposed to corporate, tenant, or internet-facing networks.
Executive priority
Treat as urgent for any exposed building automation environment. Prioritize discovery and isolation first, then vendor-supported remediation. If devices manage critical facilities and no fix is available, plan compensating controls or replacement.
Technical view
The record reports arbitrary file write and path traversal in ECOA BAS controller products. Attackers with network access can manipulate POST parameters controlling file location and content type, creating a possible remote code execution path. CVSS v3.1 is 9.8 with no privileges or user interaction required.
Likely exposure
Exposure is most likely in facilities using the listed ECOA ECS, RiskBuster, RiskTerminator, Graphic Control Software, or SmartHome II controller products. The source bundle does not provide clear fixed versions or deployment prevalence.
Exploitation context
The source bundle does not show CISA KEV listing or cited evidence of active exploitation. Risk remains serious because the vulnerability is unauthenticated, network-reachable, low-complexity, and affects operational building automation equipment.
Researcher notes
Evidence is limited to public CVE metadata and the TWCERT reference. The affected version field is not precise, and the bundle does not name a patched version. Avoid assuming exploit-in-the-wild status or product variants beyond the listed affected products.
Mitigation direction
- Identify whether listed ECOA products exist in facilities or OT networks.
- Remove direct internet or tenant-network exposure where possible.
- Restrict controller management access to trusted administrative networks only.
- Check ECOA or TWCERT guidance for supported fixes or replacement direction.
- Monitor affected devices for unexpected files, configuration changes, or service changes.
Validation and detection
- Compare asset inventory against the affected ECOA product list.
- Confirm whether controller interfaces are reachable from untrusted networks.
- Review vendor and TWCERT advisories for model-specific remediation status.
- Check logs and file integrity indicators for unauthorized changes.
- Verify firewall rules limit management access to approved administrators.
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-434: File access and web shell behavior lookup
File traversal and upload weaknesses can lead teams to review file, web shell, execution, and collection telemetry. 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 lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupFile access behavior lookup
The CVE wording references file access or upload behavior, so file telemetry and web shell review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2021-41290 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
- 9.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H3.95.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
9.8CriticalVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://www.twcert.org.tw/tw/cp-132-5126-ca315-1.htmlCVE 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.
Unrestricted Upload of File with Dangerous Type
Unrestricted Upload of File with Dangerous Type represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.