How severe is CVE-2018-11400?

CVE-2018-11400 has a CVSS 3.x base score of 4.6, rated medium severity. It is exploitable over physical access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2018-11400 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (24th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-11400?

CVE-2018-11400 affects Simplisafe U9k-bs1000 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-11400?

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

When was CVE-2018-11400 published?

CVE-2018-11400 was published on 2018-05-24 and last updated on 2026-06-17.

CVE-2018-11400

CVE-2018-11400 is a medium-severity vulnerability in Simplisafe U9k-bs1000 Firmware with a CVSS 3.x base score of 4.6. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 3.x base score 4.6)
CVSS v2: 4.9
EPSS exploit prediction: 0% (24th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Simplisafe U9k-bs1000 Firmware
Published: 2018-05-24
Last modified: 2026-06-17

Description

In SimpliSafe Original, the Base Station fails to detect tamper attempts: it does not send a notification if a physically proximate attacker removes the battery and external power.

Frequently asked questions

What is CVE-2018-11400?: In SimpliSafe Original, the Base Station fails to detect tamper attempts: it does not send a notification if a physically proximate attacker removes the battery and external power.
How severe is CVE-2018-11400?: CVE-2018-11400 has a CVSS 3.x base score of 4.6, rated medium severity. It is exploitable over physical access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2018-11400 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (24th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-11400?: CVE-2018-11400 affects Simplisafe U9k-bs1000 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-11400?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2018-11400 published?: CVE-2018-11400 was published on 2018-05-24 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:simplisafe:u9k-bs1000_firmware:-:*:*:*:*:*:*:*

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