CVE-2018-11399

SimpliSafe Original has Unencrypted Sensor Transmissions, which allows physically proximate attackers to obtain potentially sensitive information about the specific times when alarm-system events occur.

Published: 2018-05-24 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2018-11399 is rated Low Risk (19.2/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.03%). Low composite risk—no urgent action required; patch on your normal maintenance cycle and revisit priority if CVSS or EPSS increases.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2018-11399

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-03-17 0.07% 0.03% -0.04%
2 2023-03-07 0.89% 0.07% -0.82%
3 2022-02-04 — 0.89% —

Full EPSS history (4 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2018-11399

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
4.3 3.0 MEDIUM
CVSS:3.0/AV:P/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N Click to expand
Attack vector (AV:P)
Hands-on access—USB, keyboard, opening the case—not something you do purely over the wire.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 0.7 3.6 [email protected]
1.9 2.0 LOW
AV:L/AC:M/Au:N/C:P/I:N/A:N Click to expand
Access vector (AV:L)
Requires local access to the target system.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:N)
No availability impact.
 3.4 2.9 [email protected]

Weakness enumeration for CVE-2018-11399

Affected software / configurations for CVE-2018-11399

Vendor Product Version Raw CPE
simplisafe u9k-es1000_firmware — cpe:2.3:o:simplisafe:u9k-es1000_firmware:-:*:*:*:*:*:*:*
simplisafe u9k-kr1_firmware — cpe:2.3:o:simplisafe:u9k-kr1_firmware:-:*:*:*:*:*:*:*
simplisafe u9k-ms1000_firmware — cpe:2.3:o:simplisafe:u9k-ms1000_firmware:-:*:*:*:*:*:*:*
simplisafe u9k-wt1000_firmware — cpe:2.3:o:simplisafe:u9k-wt1000_firmware:-:*:*:*:*:*:*:*

References for CVE-2018-11399

cvelogic Threat Intelligence