Is CVE-2021-41293 actively exploited?

Yes. KEVIntel tracks CVE-2021-41293 as a known exploited vulnerability. Confidence is high.

What exploitation activity has KEVIntel observed?

KEVIntel has not yet recorded sensor-observed exploitation attempts for CVE-2021-41293. Our sensors continue to monitor for activity targeting this CVE.

Which versions are affected?

Version-level data is not available; KEVIntel tracks ECOA ECS Router Controller ECS (FLASH) and 6 other products.

No. CVE-2021-41293 is not currently listed in CISA KEV.

Vulnerability report

Exploited in the wild High confidence Not in CISA KEV

CVE-2021-41293

ECOA BAS controller - Path Traversal-3

ECOA / ECS Router Controller ECS (FLASH)

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Severity: CVSS 7.5 · High
Confidence: High
Exploit status: Exploited in the wild
EPSS: 20.6%
First observed: —
Last observed: —

Decision summary

What security teams need to know first

Direct answers before the deeper technical record.

What it is

CVE-2021-41293 is an unauthenticated ECOA BAS controller - Path Traversal-3 affecting ECOA ECS Router Controller ECS (FLASH) and 6 other products. ECOA BAS controller suffers from a path traversal vulnerability,...

Is it exploited?

Yes. KEVIntel tracks this CVE as a known exploited vulnerability. Confidence is high.

Who is affected?

ECOA / ECS Router Controller ECS (FLASH).

What should we do?

Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.

Overview

ECOA BAS controller suffers from a path traversal vulnerability, causing arbitrary files disclosure

ECOA 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.

Published: 30 Sep 2021
Exploitation Reported: 20 Jun 2025
Attack vector: Remote
Complexity: Low
Privileges: None
User interaction: None

CVE References

twcert.org.tw/tw/cp-132-5129-7e623-1.html twcert.org.tw · CVE Record https://www.twcert.org.tw/tw/cp-132-5129-7e623-1.html

Exploitation evidence

Why KEVIntel marks this CVE as exploited

Third-party attestation and first-party sensor observation are shown separately so teams can judge the evidence chain.

Exploited in the wild

The Shadowserver

Recorded 20 Jun 2025

Independent exploitation attestation added to the KEVIntel record.

Proof of concept available

Nuclei Templates

Recorded 12 Jun 2026

Public scanner or PoC coverage increases practical exploitability.

Known exploited vulnerability sources

Per-source evidence links for KEV attestations are available through the KEVIntel Pro API.

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Source	Added
The Shadowserver First	2025-06-20 00:00 UTC

Detection

Operational artifacts and observed signals

Make the evidence actionable in scanner, SOC, and edge-control workflows.

Observed signals

Request targets: 0
User-Agents: 0

Raw values available in Pro and Enterprise.

Scanner coverage

Nuclei template detected 25 Apr 2025.

View Nuclei template

Virtual patch status

No KEVIntel virtual patch is currently available. Future rules ship for ModSecurity, Cloudflare, and AWS WAF.

Learn about virtual patches →

Scanner Artifacts

Scanner and exploit-framework references linked to this CVE.

Scanner	Reference	Detected
Nuclei	https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2021/CVE-2021-41293.yaml	25 Apr 2025

Risk and context

Severity, weaknesses, and research context

CVSS v3.1

7.5 High

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

EPSS

20.6%

Weaknesses

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') CWE-22

Potential Proof of Concepts

These PoCs are unverified and could contain malware. Use at your own risk.

ECOA Building Automation System - Arbitrary File Retrieval

nuclei · Created Unknown

Timeline

From disclosure to observed exploitation

12 Jun 2026
Public PoC available

Public proof-of-concept code published
20 Jun 2025
Added to KEVIntel KEV Feed

High-confidence, third-party attested exploitation
25 Apr 2025
Nuclei template available

Scanner coverage available
30 Sep 2021
CVE published

Vulnerability disclosed publicly
15 Sep 2021
CVE ID reserved

Identifier reserved by the CNA

Pro API

Automate this intelligence

Confidence, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.

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Evidence confidence and provenance
First-party sensor telemetry
PoC and scanner references
Affected versions and enrichment
Automation-ready JSON delivery

GET /api/v2/pro/kevs/CVE-2021-41293

Free JSON includes basic KEV fields

{
  "cve_id": "CVE-2021-41293",
  "confidence": "High",
  "cvss_score": 7.5,
  "epss_score": 0.20623,
  "exploit_status": {
    "exploited_in_the_wild": true,
    "active_exploitation_observed": false
  },
  "sensor_telemetry": { "attempts": 0, "sensors": 0 }
}

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