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CVE-2018-15478

25
FAUCET Score

CVE-2018-15478 describes a critical authentication bypass vulnerability in various myStrom WiFi devices, including Switches, Bulbs, LED Strips, and Buttons, affecting versions prior to specified updates. An attacker could register unowned devices to their cloud account by guessing or obtaining MAC addresses, thereby hijacking control and preventing the legitimate owner from using their devices. Rated 8.1 HIGH (CVSSv3), this vulnerability has a network attack vector and high impact on confidentiality, integrity, and availability, despite requiring high attack complexity. There is no evidence of active exploitation, public exploit code, or significant community discussion.

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
0.86%
Probability of exploitation in next 30 days
EPSS Percentile
54.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0086 is in the 22nd percentile among its peer group of 8,914 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