What is CVE-2018-15479?

CVE-2018-15479 is a medium-severity vulnerability in Mystrom Wifi Bulb, classified under Improper Authentication. CVSS score: 6.5/10. Published 2018-08-30.

How severe is CVE-2018-15479?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Auth bypass in Mystrom Wifi Bulb

CVE-2018-15479

An issue was discovered in myStrom WiFi Switch V1 before 2.66, WiFi Switch V2 before 3.80, WiFi Switch EU before 3.80, WiFi Bulb before 2.58, WiFi LED Strip before 3.80, WiFi Button before 2.73, and WiFi Button Plus before 2.73. Devices did not authenticate themselves to the cloud in device to cloud communication. This lack of device authentication allowed an attacker to impersonate any device by guessing or learning their MAC address.

Vulnerability class: Broken Authentication

Published 2018-08-30 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.008 (54.6th percentile), scored 2026-10-03.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 55th percentile — 54.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-287 — Improper Authentication

References

www.swisscom.ch/content/dam/swisscom/de/about/nachhaltigkeit/digitale-schweiz/s… (Third Party Advisory)

Frequently asked questions

What is CVE-2018-15479?: CVE-2018-15479 is a medium-severity vulnerability in Mystrom Wifi Bulb, classified under Improper Authentication. CVSS score: 6.5/10. Published 2018-08-30.
How severe is CVE-2018-15479?: Medium severity. CVSS v3 base score is 6.5 out of 10.