What is CVE-2018-11402?

CVE-2018-11402 is a medium-severity vulnerability in Simplisafe U9k-Kp1000, classified under Cleartext Transmission of Sensitive Information. CVSS score: 6.6/10. Published 2018-05-24.

How severe is CVE-2018-11402?

Medium severity. CVSS v3 base score is 6.6 out of 10.

Vulnerability in Simplisafe U9k-Kp1000

CVE-2018-11402

SimpliSafe Original has Unencrypted Keypad Transmissions, which allows physically proximate attackers to discover the PIN.

Published 2018-05-24 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.6 (Medium). Vector: CVSS:3.0/AV:P/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.002 (12.0th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 12th percentile — 12.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: -0.000

Affected products

Weakness classification (CWE)

CWE-319 — Cleartext Transmission of Sensitive Information

References

simplisafe.com/files/pdf/SimpliSafe_advisory_8-17-18.pdf
www.simpleorsecure.net/simplisafe-security-advisory/ (Third Party Advisory)

Frequently asked questions

What is CVE-2018-11402?: CVE-2018-11402 is a medium-severity vulnerability in Simplisafe U9k-Kp1000, classified under Cleartext Transmission of Sensitive Information. CVSS score: 6.6/10. Published 2018-05-24.
How severe is CVE-2018-11402?: Medium severity. CVSS v3 base score is 6.6 out of 10.