CVE-2018-15476

Severity: high (CVSS 8.1 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.8% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2018-08-30 · updated 2026-06-17
Weakness: CWE-295

Description

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. The SSL/TLS server certificate in the device to cloud communication was not verified by the device. As a result, an attacker in control of the network traffic of a device could have taken control of a device by intercepting and modifying commands issued from the server to the device in a Man-in-the-Middle attack. This included the ability to inject firmware update commands into the communication and cause the device to install maliciously modified firmware.

Affected products

Mystrom Wifi Bulb Firmware: before 2.58 — fixed in 2.58
Mystrom Wifi Button Firmware: before 2.73 — fixed in 2.73
Mystrom Wifi Button Plus Firmware: before 2.73 — fixed in 2.73
Mystrom Wifi Led Strip Firmware: before 3.80 — fixed in 3.80
Mystrom Wifi Switch Eu Firmware: before 3.80 — fixed in 3.80
Mystrom Wifi Switch Firmware: before 2.66; before 3.80 — fixed in 2.66, 3.80

How to fix

Upgrade to a fixed version: Mystrom Wifi Bulb Firmware 2.58; Mystrom Wifi Button Firmware 2.73; Mystrom Wifi Button Plus Firmware 2.73; Mystrom Wifi Led Strip Firmware 3.80; Mystrom Wifi Switch Eu Firmware 3.80; Mystrom Wifi Switch Firmware 2.66, 3.80. Check the vendor advisory for mitigations.

References

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