CVE-2021-41293
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 suffers from a path traversal vulnerability, causing arbitrary files disclosure. Using the specific POST parameter, unauthenticated attackers can remotely disclose arbitrary files on the affected device and disclose sensitive and system information.
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 confidenceThe ECOA BAS controller contains a path traversal vulnerability in a specific POST parameter, allowing unauthenticated remote attackers to access arbitrary files on the device filesystem. This exposes sensitive system configuration files, credentials, and other operational data.
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
- None
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/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 checksWork through these to decide whether this CVE applies to you.
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Identify Ecoa BAS controller on the networkLocate devices matching the affected product names: Ecoa ECS Router Controller, Ecoa Riskbuster, or Ecoa Riskterminator. Check device documentation, network scans, or asset inventories for these specific product names.Affected if The device is any Ecoa ECS Router Controller, Riskbuster, or Riskterminator firmware.
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Confirm web management interface is accessibleAttempt to access the device web interface on typical HTTP/HTTPS ports (80, 443, or vendor-default ports). Check if the BAS controller management portal responds to requests.Affected if The web management interface is reachable and responds.
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Check if device is exposed to untrusted networksReview firewall rules, NAT configurations, and access control lists to determine if the device management interface is accessible from external networks, the internet, or non-operational technology (OT) segments.Affected if The device management interface is reachable from untrusted networks or the internet without proper network segmentation.
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Verify vulnerability presence through parameter testingIf the web interface is accessible, send a crafted POST request with path traversal sequences (such as ../../etc/passwd or similar) to the suspected vulnerable endpoint. Compare the response against expected behavior for the device.Affected if The device accepts path traversal patterns in POST parameters and returns file contents from the underlying filesystem.
The environment is affected if any Ecoa ECS Router Controller, Riskbuster, or Riskterminator device has its web management interface exposed to untrusted networks, since all firmware versions contain the path traversal vulnerability.
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 dataApply vendor-supplied firmware updates for the ECOA BAS controller. If no patch exists, implement network segmentation to restrict access to the BAS controller and disable remote management interfaces where possible.
- Consultation4.0 h
- Implementation8.0 h
- Testing6.0 h
- Review / QA4.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2021-41293 — 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-2021-41293 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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