How severe is CVE-2018-6401?

CVE-2018-6401 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2018-6401 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (65th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-6401?

CVE-2018-6401 affects Meross Mss110 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-6401?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2018-6401 published?

CVE-2018-6401 was published on 2018-05-02 and last updated on 2026-06-17.

CVE-2018-6401

CVE-2018-6401 is a critical-severity vulnerability in Meross Mss110 Firmware with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-798.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 1% (65th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-798
Affected product: Meross Mss110 Firmware
Published: 2018-05-02
Last modified: 2026-06-17

Description

Meross MSS110 devices before 1.1.24 contain a TELNET listener providing access for an undocumented admin account with a blank password.

Frequently asked questions

What is CVE-2018-6401?: Meross MSS110 devices before 1.1.24 contain a TELNET listener providing access for an undocumented admin account with a blank password.
How severe is CVE-2018-6401?: CVE-2018-6401 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2018-6401 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (65th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-6401?: CVE-2018-6401 affects Meross Mss110 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-6401?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2018-6401 published?: CVE-2018-6401 was published on 2018-05-02 and last updated on 2026-06-17.

References

https://garrettmiller.github.io/meross-mss110-vuln/

Affected products (1)

cpe:2.3:o:meross:mss110_firmware:*:*:*:*:*:*:*:*

More vulnerabilities in Meross Mss110 Firmware

CVE-2018-10544 — Critical (CVSS 9.8): Meross MSS110 devices through 1.1.24 contain an unauthenticated admin.htm administrative interface.

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