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CVE-2018-15476

26
FAUCET Score

CVE-2018-15476 describes a critical vulnerability in various myStrom WiFi devices (Switches, Bulbs, Buttons, LED Strips) where the devices failed to verify the SSL/TLS server certificate during cloud communication. This flaw allows a remote attacker, positioned to intercept network traffic, to perform a Man-in-the-Middle (MitM) attack. With a CVSS score of 8.1 (HIGH), the vulnerability enables an attacker to take full control of affected devices, including injecting malicious firmware updates. Despite its high severity and potential for complete compromise, there is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 2.66CPE matchmatch criteria
cpe:2.3:o:mystrom:wifi_switch_firmware:*:*:*:*:*:*:*:*
< 3.80CPE matchmatch criteria
cpe:2.3:o:mystrom:wifi_switch_firmware:*:*:*:*:*:*:*:*
< 2.73CPE matchmatch criteria
cpe:2.3:o:mystrom:wifi_button_plus_firmware:*:*:*:*:*:*:*:*
< 2.73CPE matchmatch criteria
cpe:2.3:o:mystrom:wifi_button_firmware:*:*:*:*:*:*:*:*
< 3.80CPE matchmatch criteria
cpe:2.3:o:mystrom:wifi_switch_eu_firmware:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

8.1HIGH

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.2
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
0.76%
Probability of exploitation in next 30 days
EPSS Percentile
51.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0076 is in the 20th percentile among its peer group of 8,915 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

swisscom.ch / content/dam/swisscom/de/about/nachhaltigkeit/digitale-schweiz/sicherheit/bug-bounty/files/cve-2018-15476ff.txt
Third Party Advisory