ECOA BAS controller - Broken Authentication

published 2021-09-30 5y ago modified 2026-06-17 4mo ago also EUVD-2021-28322

cvss: 9.8; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 1.2%; EPSS 1.2% chance of exploitation in 30 days, percentile 67%
public exploits: 0; none known

ECOA BAS controller suffers from an authentication bypass vulnerability. An unauthenticated attacker through cookie poisoning can remotely bypass authentication and disclose sensitive information and circumvent physical access controls in smart homes and buildings and manipulate HVAC.

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Exploit prediction

1.17% chance of exploitation in the next 30 days, higher than 67% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by	version	score	vector
CNA	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD	3.1	9.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
NVD	2.0	6.4	AV:N/AC:L/Au:N/C:P/I:P/A:N

Affected products

ECOA ECS Router Controller ECS (FLASH)
ECOA RiskBuster Terminator E6L45
ECOA RiskBuster System RB 3.0.0
ECOA RiskBuster System TRANE 1.0
ECOA Graphic Control Software
ECOA SmartHome II E9246
ECOA RiskTerminator

Classification

Weakness

CWE-288 Authentication Bypass Using an Alternate Path or Channel
CWE-287 Improper Authentication

References

twcert.org.tw /tw/cp-132-5128-b075a-1.html
third-party-advisory

Sources

CVE List CVE-2021-41292
NVD CVE-2021-41292

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