How severe is CVE-2021-40392?

CVE-2021-40392 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2021-40392 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (44th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-40392?

CVE-2021-40392 affects Moxa Mxview. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-40392?

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

When was CVE-2021-40392 published?

CVE-2021-40392 was published on 2022-04-14 and last updated on 2026-06-17.

CVE-2021-40392

CVE-2021-40392 is a high-severity vulnerability in Moxa Mxview with a CVSS 3.x base score of 7.5. 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-319.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 1% (44th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-319
Affected product: Moxa Mxview
Published: 2022-04-14
Last modified: 2026-06-17

Description

An information disclosure vulnerability exists in the Web Application functionality of Moxa MXView Series 3.2.4. Network sniffing can lead to a disclosure of sensitive information. An attacker can sniff network traffic to exploit this vulnerability.

Frequently asked questions

What is CVE-2021-40392?: An information disclosure vulnerability exists in the Web Application functionality of Moxa MXView Series 3.2.4. Network sniffing can lead to a disclosure of sensitive information. An attacker can sniff network traffic to exploit this vulnerability.
How severe is CVE-2021-40392?: CVE-2021-40392 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2021-40392 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (44th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-40392?: CVE-2021-40392 affects Moxa Mxview. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-40392?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-40392 published?: CVE-2021-40392 was published on 2022-04-14 and last updated on 2026-06-17.

References

https://talosintelligence.com/vulnerability_reports/TALOS-2021-1403

Affected products (1)

cpe:2.3:a:moxa:mxview:3.2.4:*:*:*:*:*:*:*

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