Meross MSS550X Missing Encryption of Sensitive Data
Priority LOW 34CWE-319Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-319.
Summary
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00726 54th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Meross | Meross Smart Wi-Fi 2 Way Wall Switch | up to 3.1.3 | — | No fix listed | CNA |
- Meross Smart Wi-Fi 2 Way Wall Switch VendorMeross Affected up to 3.1.3 Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-3774
- 2026-10-03 Alias added: GHSA-p792-3c6f-m4p5
References
Sources
- CVE-2021-3774 · CVE Program
- CVE-2021-3774 · NVD
- FIRST EPSS
- GHSA-p792-3c6f-m4p5 · GitHub Advisory Database · CC BY 4.0
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