How severe is CVE-2021-40170?

CVE-2021-40170 has a CVSS 3.x base score of 6.8, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity high, and availability high.

Is CVE-2021-40170 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (55th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-40170?

CVE-2021-40170 affects Securitashome Securitashome Alarm System Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-40170?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-40170 published?

CVE-2021-40170 was published on 2021-12-15 and last updated on 2026-06-17.

CVE-2021-40170

CVE-2021-40170 is a medium-severity vulnerability in Securitashome Securitashome Alarm System Firmware with a CVSS 3.x base score of 6.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-294.

Key facts

Severity: Medium (CVSS 3.x base score 6.8)
CVSS v2: 5.8
EPSS exploit prediction: 1% (55th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-294
Affected product: Securitashome Securitashome Alarm System Firmware
Published: 2021-12-15
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2021-40170?: 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.
How severe is CVE-2021-40170?: CVE-2021-40170 has a CVSS 3.x base score of 6.8, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity high, and availability high.
Is CVE-2021-40170 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (55th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-40170?: CVE-2021-40170 affects Securitashome Securitashome Alarm System Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-40170?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-40170 published?: CVE-2021-40170 was published on 2021-12-15 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:securitashome:securitashome_alarm_system_firmware:hpgw-g_0.0.2.23f_bg_u-itr-f1-bd_bl.a30.20181117:*:*:*:*:*:*:*

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