CVE-2021-20989

What it is

Fibaro Home Center 2 and Lite devices with firmware version 4.600 and older initiate SSH connections to the Fibaro cloud to provide remote access and remote support capabilities. This connection can be intercepted using DNS spoofing attack and a device initiated remote port-forward channel can be used to connect to the web management interface. Knowledge of authorization credentials to the management interface is required to perform any further actions.

At a glance

Exploitability

Can be exploited over the network without logging in. High risk of data exposure.

Exploit odds

2.1% chance of exploitation in the next 30 days (EPSS).

Fix

No patch or advisory is linked yet. Look at mitigations or restrict exposure.

Timeline

1. 2021-04-19 14:15 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-17 03:34 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 2.1% in the next 30 days (EPSS).
• Severity: 5.9 MEDIUM (CVSS).
• Fix: none linked yet, which raises it.

Details

Published

2021-04-19 14:15 UTC

Last modified

2026-06-17 03:34 UTC

Exploit probability

2.1% · EPSS, next 30 days

Weakness

CWE-295 · Improper certificate validation

Record status

Modified

Affected

• Fibaro Home Center 2 Firmware ≤ 4.600
• Fibaro Home Center Lite Firmware ≤ 4.600

Attack profile CVSS 3.1 · 5.9

Attack vector

Network

Complexity

High

Privileges needed

None

User interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2021-20989.md and follow it. Check whether this project is affected by CVE-2021-20989. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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