CVE-2021-20991

Name: CVE-2021-20991
Creator: NVD / NIST
Published: 2021-04-19T14:15:11.787+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 5.44%

Last modified Jun 17, 2026

CVE-2021-20991 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. In Fibaro Home Center 2 and Lite devices with firmware version 4.540 and older an authenticated user can run commands as root user using a command injection vulnerability.. EPSS estimates a 5.44% chance of exploitation in the next 30 days.

Description

In Fibaro Home Center 2 and Lite devices with firmware version 4.540 and older an authenticated user can run commands as root user using a command injection vulnerability.

Metrics

CVSS 3.1

8.8/10

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

EPSS Probability

5.44%

91.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Fibaro	Home Center 2 Firmware	<= 4.540
Fibaro	Home Center Lite Firmware	<= 4.540

References

http://packetstormsecurity.com/files/162243/Fibaro-Home-Center-MITM-Missing-Authentication-Code-Execution.htmlExploit, Third Party Advisory, VDB Entry
http://seclists.org/fulldisclosure/2021/Apr/27Mailing List, Third Party Advisory
https://www.iot-inspector.com/blog/advisory-fibaro-home-center/Exploit, Third Party Advisory
http://packetstormsecurity.com/files/162243/Fibaro-Home-Center-MITM-Missing-Authentication-Code-Execution.htmlExploit, Third Party Advisory, VDB Entry
http://seclists.org/fulldisclosure/2021/Apr/27Mailing List, Third Party Advisory
https://www.iot-inspector.com/blog/advisory-fibaro-home-center/Exploit, Third Party Advisory

Timeline

Published: Apr 19, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-20991?

In Fibaro Home Center 2 and Lite devices with firmware version 4.540 and older an authenticated user can run commands as root user using a command injection vulnerability.

How severe is CVE-2021-20991?

CVE-2021-20991 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 5.44% probability of exploitation in the next 30 days.

How do I fix CVE-2021-20991?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-20991?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST