Security readout for executives and security teams
Fibaro Home Center 2 and Home Center Lite devices running firmware 4.540 or older may let an attacker run system commands as root. That can mean full control of the smart-home controller and connected automation environment. The bundle does not show confirmed active exploitation. Exposure is limited to deployments using Fibaro Home Center 2 or Home Center Lite on firmware 4.540 or older. Risk increases where management access is reachable from untrusted networks or accounts are weak, shared, or compromised. Prioritize remediation where affected controllers manage physical security, access control, safety-relevant automation, or are reachable beyond a trusted local network. Full root command execution can turn a convenience device into a network foothold. Mitigation focus: Inventory Fibaro Home Center 2 and Lite devices immediately.; Check Fibaro or Fibar guidance for fixed firmware or supported remediation.; Restrict controller administration to trusted networks or VPN access..
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
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ATT&CK lookup starting points
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CWE-78: Command execution behavior lookup
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Open ATT&CK lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2021-20991 mapping review
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Open ATT&CK lookup- Severity
- Critical
- CVSS
- 9.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
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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:H/A:H3.95.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
9.8CriticalVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://www.iot-inspector.com/blog/advisory-fibaro-home-center/CVE reference · x_refsource_CONFIRM
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.