Security readout for executives and security teams
Plain-English summary
CVE-2021-41291 affects listed ECOA building automation controller products. An unauthenticated remote attacker could use a path traversal flaw in File Manager to disclose directory contents. This is mainly a confidentiality risk, but exposed BAS controllers can reveal operational files or configuration details useful for later attacks.
Executive priority
Prioritize exposed BAS controllers for immediate containment and vendor follow-up. Internally isolated devices are lower urgency but still need tracking because the flaw requires no login and can disclose sensitive operational information.
Technical view
The CVE is a CWE-22 path traversal issue in the File Manager GET parameter. CVSS v3.1 is 7.5: network reachable, low complexity, no privileges, no user interaction, high confidentiality impact, no stated integrity or availability impact. The bundle does not name a patch or workaround.
Likely exposure
Exposure is most likely where affected ECOA BAS controller web interfaces are reachable from the internet, vendor networks, tenant networks, or broad internal networks. Version data is sparse, so teams should confirm deployed model and firmware directly against vendor guidance.
Exploitation context
The source bundle does not show CISA KEV listing or cited evidence of active exploitation. However, the vulnerability is remotely reachable and unauthenticated, so any exposed controller interface should be treated as a serious disclosure risk.
Researcher notes
Evidence is limited to the CVE record and TWCERT reference. Affected version strings are nonstandard and no CPEs, patch identifiers, or exploit observations are provided. Avoid assuming broader ECOA product impact beyond the named affected products.
Mitigation direction
- Inventory ECOA controllers and match them to the affected product list.
- Remove internet exposure for controller management interfaces.
- Restrict access with firewall rules, VPN, and trusted administration networks.
- Check ECOA or TWCERT guidance for patches or supported workarounds.
- Monitor BAS web logs for suspicious File Manager GET activity.
Validation and detection
- Confirm whether deployed ECOA products match the affected list.
- Verify File Manager is not reachable from untrusted networks.
- Review external attack surface scans for exposed ECOA controller interfaces.
- Check logs for unusual directory browsing or traversal-like requests.
- Document patch, firmware, or compensating-control status per device.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-22: File access and web shell behavior lookup
File traversal and upload weaknesses can lead teams to review file, web shell, execution, and collection telemetry. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupFile access behavior lookup
The CVE wording references file access or upload behavior, so file telemetry and web shell review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2021-41291 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 7.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N3.93.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.5HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://www.twcert.org.tw/tw/cp-132-5127-3cbd3-1.htmlCVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.