How severe is CVE-2021-38458?

CVE-2021-38458 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-2021-38458 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (75th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-38458?

CVE-2021-38458 affects Moxa Mxview. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-38458?

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-2021-38458 published?

CVE-2021-38458 was published on 2021-10-12 and last updated on 2026-06-17.

CVE-2021-38458

CVE-2021-38458 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-74.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 2% (75th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-74
Affected product: Moxa Mxview
Published: 2021-10-12
Last modified: 2026-06-17

Description

A path traversal vulnerability in the Moxa MXview Network Management software Versions 3.x to 3.2.2 may allow an attacker to create or overwrite critical files used to execute code, such as programs or libraries.

Frequently asked questions

What is CVE-2021-38458?: A path traversal vulnerability in the Moxa MXview Network Management software Versions 3.x to 3.2.2 may allow an attacker to create or overwrite critical files used to execute code, such as programs or libraries.
How severe is CVE-2021-38458?: CVE-2021-38458 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-2021-38458 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (75th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-38458?: CVE-2021-38458 affects Moxa Mxview. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-38458?: 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-2021-38458 published?: CVE-2021-38458 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:*:*:*:*:*:*:*:*

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