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Ecs Router Controller Ecs FirmwareOperating system · Ecoa

CVE-2021-41292

CRITICAL · 9.1 CVSS v3.1 Published 2021-09-30
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
100/100
Remediation priority · Urgent
Remotely reachable No privileges Zero-click

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
ECOA BAS controller suffers from an authentication bypass vulnerability. An unauthenticated attacker through cookie poisoning can remotely bypass authentication and disclose sensitive information and circumvent physical access controls in smart homes and buildings and manipulate HVAC.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · moderate confidence

The ECOA BAS (Building Automation System) controller contains an authentication bypass vulnerability that allows unauthenticated attackers to bypass authentication mechanisms through cookie poisoning. Successful exploitation enables remote disclosure of sensitive information, circumvention of physical access controls, and manipulation of HVAC systems in smart home and building environments.

MitigationApply available vendor patches or firmware updates for the ECOA BAS controller; if no patch exists, implement network segmentation to isolate the BAS from untrusted networks and enforce additional authentication layers such as VPN access or IP whitelisting.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Ecs Router Controller Ecs FirmwareOperating system
Affected:all versions
Riskbuster FirmwareOperating system
Affected:all versions
RiskterminatorApplication
Affected:all versions

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Identify ECOA BAS controllers on the network
    Scan the network for devices with ECOA-specific service banners, or check network documentation for presence of Ecoa Ecs Router Controller, Riskbuster, or Riskterminator devices. These are typically found on building automation subnets.
    Affected if Any Ecoa Ecs Router Controller, Riskbuster, or Riskterminator device is present on the network
  2. Check if ECOA web management interface is exposed
    Access the suspected ECOA device web interface via HTTP/HTTPS on typical ports 80, 443, or 8080. Verify the device responds with ECOA-specific login pages or error messages.
    Affected if The ECOA device web interface is accessible from the network being assessed
  3. Verify cookie-based authentication is in use
    Inspect the web login process using browser developer tools or a proxy. Check if the device sets authentication cookies upon login (look for Set-Cookie headers) and whether these cookies can be manipulated.
    Affected if The device uses cookie-based session management for authentication
  4. Test for authentication bypass via cookie poisoning
    Attempt to access protected pages or API endpoints without valid credentials by modifying cookie values. Common cookie names to test include auth, session, user, token, or similar authentication-related cookie names.
    Affected if Access to protected resources is granted after manipulating cookie values without valid credentials
  5. Confirm device is reachable from untrusted network segments
    Review network segmentation and firewall rules to determine if the ECOA BAS controller is accessible from guest networks, the internet, or other untrusted network zones.
    Affected if The ECOA device is accessible from network segments that should not have BAS access

If any ECOA Ecs Router Controller, Riskbuster, or Riskterminator device exists and its web interface is network-accessible, the environment is affected by this authentication bypass vulnerability.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

From vendor data
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Apply available vendor patches or firmware updates for the ECOA BAS controller; if no patch exists, implement network segmentation to isolate the BAS from untrusted networks and enforce additional authentication layers such as VPN access or IP whitelisting.

Fix this in Ecs Router Controller Ecs Firmware Scoped from the published advisory
  • Consultation4.0 h
  • Implementation6.0 h
  • Testing4.0 h
  • Review / QA2.0 h
16.0 hours of engineering $2,840
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2021-41292 in production — separate from our analysis above.

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What this is

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What belongs here
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  • Version or environment caveats, and links to real fixes
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