PT-2021-21854 · Meross · Meross Smart Wi-Fi 2 Way Wall Switch

Gerard Fuguet Morales · Published 2021-11-05 · Updated 2023-11-20 · CVE-2021-3774

Positive Technologies (AI Summary)

CVSS v3.1

7.4

High

Base vector

AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N

Name of the Vulnerable Software and Affected Versions: Meross Smart Wi-Fi 2 Way Wall Switch (MSS550X) versions 3.1.3 and earlier

Description: The issue allows a remote attacker to obtain the Wi-Fi SSID and the password configured by the user from the Meross app via an Http/JSON plain request. This is possible because the device creates an open Wi-Fi Access Point without the required security measures in its initial setup.

Recommendations: For Meross Smart Wi-Fi 2 Way Wall Switch (MSS550X) versions 3.1.3 and earlier, consider disabling the device's Wi-Fi Access Point feature until a secure configuration can be applied. Restrict access to the device's initial setup process to minimize the risk of exploitation. Avoid using the device's default setup until a patch or secure configuration is available. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Cleartext Transmission of Sensitive Information

Weakness Enumeration

CWE-319

Related Identifiers

CVE-2021-3774

Affected Products

Meross Smart Wi-Fi 2 Way Wall Switch

References · 4

• https://nvd.nist.gov/vuln/detail/CVE-2021-3774 · Security Note
• https://osv.dev/vulnerability/CVE-2021-3774 · Vendor Advisory
• https://t.me/cvenotify/60763 · Telegram Post
• https://incibe.es/en/incibe-cert/notices/aviso/meross-mss550x-missing-encryption-sensitive-data · Note