How severe is CVE-2021-38456?

CVE-2021-38456 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-2021-38456 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (62nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-38456?

CVE-2021-38456 affects Moxa Mxview. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-38456?

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-2021-38456 published?

CVE-2021-38456 was published on 2021-10-12 and last updated on 2026-06-17.

CVE-2021-38456

CVE-2021-38456 is a critical-severity vulnerability in Moxa Mxview 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% (62nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-798
Affected product: Moxa Mxview
Published: 2021-10-12
Last modified: 2026-06-17

Description

A use of hard-coded password vulnerability in the Moxa MXview Network Management software Versions 3.x to 3.2.2 may allow an attacker to gain access through accounts using default passwords

Frequently asked questions

What is CVE-2021-38456?: A use of hard-coded password vulnerability in the Moxa MXview Network Management software Versions 3.x to 3.2.2 may allow an attacker to gain access through accounts using default passwords
How severe is CVE-2021-38456?: CVE-2021-38456 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-2021-38456 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (62nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-38456?: CVE-2021-38456 affects Moxa Mxview. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-38456?: 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-2021-38456 published?: CVE-2021-38456 was published on 2021-10-12 and last updated on 2026-06-17.

References

https://us-cert.cisa.gov/ics/advisories/icsa-21-278-03

Affected products (1)

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

More vulnerabilities in Moxa Mxview

CVE-2021-38454 — Critical (CVSS 10.0): A path traversal vulnerability in the Moxa MXview Network Management software Versions 3.x to 3.2.2 may allow an…
CVE-2021-40390 — Critical (CVSS 9.8): An authentication bypass vulnerability exists in the Web Application functionality of Moxa MXView Series 3.2.4. A…
CVE-2021-38458 — Critical (CVSS 9.8): A path traversal vulnerability in the Moxa MXview Network Management software Versions 3.x to 3.2.2 may allow an…
CVE-2020-13537 — High (CVSS 7.8): An exploitable local privilege elevation vulnerability exists in the file system permissions of Moxa MXView series…
CVE-2020-13536 — High (CVSS 7.8): An exploitable local privilege elevation vulnerability exists in the file system permissions of Moxa MXView series…
CVE-2017-14030 — High (CVSS 7.8): An issue was discovered in Moxa MXview v2.8 and prior. The unquoted service path escalation vulnerability could allow…

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