CVE-2021-41296
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 · uneditedECOA BAS controller uses weak set of default administrative credentials that can be easily guessed in remote password attacks and gain full control of the system.
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 · high confidenceThe ECOA Building Automation System (BAS) controller ships with weak default administrative credentials that can be easily guessed in remote password attacks, allowing unauthenticated attackers to gain full administrative control of the system.
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 dataall versionsall versionsall versionsCVSS 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
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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 checksWork through these to decide whether this CVE applies to you.
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Identify ECOA BAS controllers on the networkScan your network for devices with ECOA vendor OUI (Organizationally Unique Identifier) in MAC addresses, or inventory your building automation systems for Ecoa Ecs Router Controller, Ecoa Riskbuster, or Ecoa Riskterminator devices. Check device labels, management interfaces, or DHCP logs for ECOA product signatures.Affected if Any Ecoa Ecs Router Controller, Ecoa Riskbuster, or Ecoa Riskterminator device is present on the network
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Verify default credentials statusAttempt to access the device administrative interface using known default credential pairs (consult ECOA product documentation for factory-set usernames and passwords). Check if authentication succeeds with default credentials.Affected if Default factory credentials still grant administrative access to the device
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Check remote administrative access exposureReview firewall rules and device network settings to determine if administrative interfaces (typically HTTP/HTTPS on ports 80/443, or Telnet/SSH) are exposed to networks outside the building automation system VLAN. Use network scanning to identify externally accessible management ports.Affected if Administrative interfaces are reachable from networks outside the BAS segment or from untrusted external addresses
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Assess network segmentation of BAS devicesExamine network topology and access control lists to determine if ECOA controllers are isolated from corporate IT networks, guest networks, or the internet. Verify that only authorized BAS management stations can reach device management interfaces.Affected if ECOA devices are not isolated from untrusted network segments or are directly accessible from the internet
A defender is affected if any ECOA Ecs Router Controller, Riskbuster, or Riskterminator device with default credentials is present and its administrative interface is reachable from any network outside the trusted BAS management zone.
Generated from the published advisory. Verify against your own configuration.
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 dataImmediately change default credentials to strong, unique passwords on all affected ECOA BAS controllers; disable remote administrative access if not required; implement network segmentation to isolate BAS devices from untrusted networks.
- Consultation4.0 h
- Implementation4.0 h
- Testing2.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $3,488.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2021-41296 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2021-41296 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
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