CVE-2021-3774

Meross MSS550X Missing Encryption of Sensitive Data

Description

Meross Smart Wi-Fi 2 Way Wall Switch (MSS550X), on its 3.1.3 version and before, creates an open Wi-Fi Access Point without the required security measures in its initial setup. This could allow a remote attacker to obtain the Wi-Fi SSID as well as the password configured by the user from Meross app via Http/JSON plain request.

Remediation

Solution:

  • This vulnerability has been solved by Meross in MSS550X version 3.2.3.

Category

7.4
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.15%
Affected: Meross Meross Smart Wi-Fi 2 Way Wall Switch
Published at:
Updated at:

References

Link Tags
https://www.incibe.es/en/incibe-cert/notices/aviso/meross-mss550x-missing-encryption-sensitive-data

Frequently Asked Questions

What is the severity of CVE-2021-3774?
CVE-2021-3774 has been scored as a high severity vulnerability.
How to fix CVE-2021-3774?
To fix CVE-2021-3774: This vulnerability has been solved by Meross in MSS550X version 3.2.3.
Is CVE-2021-3774 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-3774 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-3774?
CVE-2021-3774 affects Meross Meross Smart Wi-Fi 2 Way Wall Switch.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.