PatchTheCVECVE-2021-41291: ECOA BAS controller suffers from a path traversal content disclosure vulnerability
CVE-2021-41291 is a high-severity flaw (CVSS 7.5) affecting ecs router controller-ecs firmware, riskbuster firmware, riskterminator. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
ECOA BAS controller suffers from a path traversal content disclosure vulnerability. Using the GET parameter in File Manager, unauthenticated attackers can remotely disclose directory content on the affected device.
Why this priority
- High severity
- EPSS top 1%: very likely to be exploited
- Remotely exploitable, no login, no user action
No fix is published yet: follow the downgrade or mitigation steps.
Risk facts
| CVSS score | 7.5 (High) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 82.7% (top 1%) |
| CISA exploited list | No |
| Weakness | CWE-22 |
| Published | 2021-09-30 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Public exploits and detection
Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.
- Nuclei scan template: ECOA Building Automation System - Directory Traversal Content Disclosure
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2021-41291?
ecs router controller-ecs firmware: mitigate or apply the listed mitigation; riskbuster firmware: mitigate or apply the listed mitigation; riskterminator: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.
Is CVE-2021-41291 being exploited?
CVE-2021-41291 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2021-41291 affect?
CVE-2021-41291 affects ecs router controller-ecs firmware, riskbuster firmware, riskterminator. Severity is high (CVSS 7.5). ECOA BAS controller suffers from a path traversal content disclosure vulnerability. Using the GET parameter in File Manager, unauthenticated attackers can remotely disclose directory content on the affected device.
How urgent is CVE-2021-41291?
Priority 56/100. High severity; EPSS top 1%: very likely to be exploited; Remotely exploitable, no login, no user action
Related CVEs
- CVE-2021-41302 HIGH 7.3 MITIGATE MITIGATE ECOA BAS controller stores sensitive data (backup exports) in clear-text, thus the unauthenticated attacker ca
- CVE-2021-41301 CRITICAL 9.8 MITIGATE MITIGATE ECOA BAS controller is vulnerable to configuration disclosure when direct object reference is made to the spec
- CVE-2021-41300 CRITICAL 9.8 MITIGATE MITIGATE ECOA BAS controller’s special page displays user account and passwords in plain text, thus unauthenticated att
- CVE-2021-41299 CRITICAL 9.8 MITIGATE MITIGATE ECOA BAS controller is vulnerable to hard-coded credentials within its Linux distribution image, thus remote a
- CVE-2021-41298 HIGH 8.8 MITIGATE MITIGATE ECOA BAS controller is vulnerable to insecure direct object references that occur when the application provide