CVE-2021-40170

Name: CVE-2021-40170
Creator: NVD / NIST
Published: 2021-12-15T07:15:07.083+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.8/10EPSS 0.88%

Last modified Jun 17, 2026

CVE-2021-40170 is a medium-severity vulnerability rated 6.8/10 on the CVSS scale. An RF replay attack vulnerability in the SecuritasHome home alarm system, version HPGW-G 0.0.2.23F BG_U-ITR-F1-BD_BL.A30.20181117, allows an attacker to trigger arbitrary system functionality by replaying previously recorded signals. This lets an adversary, among other things, disarm an armed system.. EPSS estimates a 0.88% chance of exploitation in the next 30 days.

Description

An RF replay attack vulnerability in the SecuritasHome home alarm system, version HPGW-G 0.0.2.23F BG_U-ITR-F1-BD_BL.A30.20181117, allows an attacker to trigger arbitrary system functionality by replaying previously recorded signals. This lets an adversary, among other things, disarm an armed system.

Metrics

CVSS 3.1

6.8/10

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

EPSS Probability

0.88%

54.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-294

Affected Software

Vendor	Product	Versions
Securitashome	Securitashome Alarm System Firmware	hpgw-g_0.0.2.23f_bg_u-itr-f1-bd_bl.a30.20181117

References

https://www.diva-portal.org/smash/get/diva2:1600180/FULLTEXT04.pdfExploit, Technical Description, Third Party Advisory
https://www.securitashome.se/product.html/securitashomeVendor Advisory
https://www.diva-portal.org/smash/get/diva2:1600180/FULLTEXT04.pdfExploit, Technical Description, Third Party Advisory
https://www.securitashome.se/product.html/securitashomeVendor Advisory

Timeline

Published: Dec 15, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-40170?

How severe is CVE-2021-40170?

CVE-2021-40170 has a CVSS score of 6.8/10 (MEDIUM severity). The EPSS model estimates a 0.88% probability of exploitation in the next 30 days.

How do I fix CVE-2021-40170?

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-2021-40170?

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

Scan your code now

Source: NVD / NIST