CVE-2018-15477: myStrom WiFi Switch V1 devices before 2.66 did not sanitize a parameter received from the cloud that was used

Q: How do I fix CVE-2018-15477?

wifi switch firmware: upgrade to 2.66. Exact commands for each OS are on this page.

Q: Is CVE-2018-15477 being exploited?

CVE-2018-15477 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2018-15477 affect?

CVE-2018-15477 affects wifi switch firmware. Severity is critical (CVSS 9.8). myStrom WiFi Switch V1 devices before 2.66 did not sanitize a parameter received from the cloud that was used in an OS command. Malicious servers were able to run operating system commands on the device.

Q: How urgent is CVE-2018-15477?

Priority 58/100. Critical severity; Remotely exploitable, no login, no user action

This month

CRITICAL 9.8REMOTEUPGRADE

CVE-2018-15477 is a critical-severity flaw (CVSS 9.8) affecting wifi switch firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

myStrom WiFi Switch V1 devices before 2.66 did not sanitize a parameter received from the cloud that was used in an OS command. Malicious servers were able to run operating system commands on the device.

Why this priority

Critical severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.6% (top 24%)
CISA exploited list	No
Weakness	CWE-78
Published	2018-08-30
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: mystrom

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2018-08-30 17:29 UTCPublished CVE record published
2026-06-17 01:42 UTCUpdated Record last modified

mystrom wifi switch firmware UPGRADE

Affected: < 2.66

Fixed in: 2.66

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2018-15477?

wifi switch firmware: upgrade to 2.66. Exact commands for each OS are on this page.

Is CVE-2018-15477 being exploited?

CVE-2018-15477 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2018-15477 affect?

CVE-2018-15477 affects wifi switch firmware. Severity is critical (CVSS 9.8). myStrom WiFi Switch V1 devices before 2.66 did not sanitize a parameter received from the cloud that was used in an OS command. Malicious servers were able to run operating system commands on the device.

How urgent is CVE-2018-15477?

Priority 58/100. Critical severity; Remotely exploitable, no login, no user action

Software pages

Wi-Fi vulnerabilities

Related CVEs

CVE-2018-15480 HIGH 8.8 UPGRADE UPGRADE An issue was discovered in myStrom WiFi Switch V1 before 2.66, WiFi Switch V2 before 3.80, WiFi Switch EU befo
CVE-2018-15479 MEDIUM 6.5 UPGRADE UPGRADE An issue was discovered in myStrom WiFi Switch V1 before 2.66, WiFi Switch V2 before 3.80, WiFi Switch EU befo
CVE-2018-15478 HIGH 8.1 UPGRADE UPGRADE An issue was discovered in myStrom WiFi Switch V1 before 2.66, WiFi Switch V2 before 3.80, WiFi Switch EU befo
CVE-2018-15476 HIGH 8.1 UPGRADE UPGRADE An issue was discovered in myStrom WiFi Switch V1 before 2.66, WiFi Switch V2 before 3.80, WiFi Switch EU befo

References

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