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Vulnerability record · CVE-2021-40390 · published 14 April 2022

CVE-2021-40390: Moxa mxview hard-coded credentials vulnerability

Moxa · Mxview

An authentication bypass vulnerability exists in the Web Application functionality of Moxa MXView Series 3.2.4. A specially-crafted HTTP request can lead to unauthorized access. An attacker can send an HTTP request to trigger this vulnerability.

9.8 CVSS 3.1 Critical EPSS 2.5% · top 16.2% CWE-798 · Hard-coded credentials
9.8CVSS 3.1 base score, v2 7.5
2.5%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

An authentication bypass vulnerability exists in the Web Application functionality of Moxa MXView Series 3.2.4. A specially-crafted HTTP request can lead to unauthorized access. An attacker can send an HTTP request to trigger this vulnerability.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://talosintelligence.com/vulnerability_reports/TALOS-2021-1401 ExploitThird Party Advisory
https://talosintelligence.com/vulnerability_reports/TALOS-2021-1401 ExploitThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

10.0CVE-2021-38454Moxa mxview improper access control vulnerabilityA 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 crit…EPSS 16%9.8CVE-2021-38456Moxa mxview hard-coded password vulnerabilityA 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 …EPSS 1.2%9.8CVE-2021-38458Moxa mxview injection vulnerabilityA 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 crit…EPSS 1.8%9.1CVE-2021-38452Moxa mxview path traversal vulnerabilityA 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 crit…EPSS 1.7%7.8CVE-2020-13536Moxa mxview incorrect default permissions vulnerabilityAn exploitable local privilege elevation vulnerability exists in the file system permissions of Moxa MXView series 3.1.8 installation. Depending on t…EPSS 0.55%7.8CVE-2020-13537Moxa mxview incorrect default permissions vulnerabilityAn exploitable local privilege elevation vulnerability exists in the file system permissions of Moxa MXView series 3.1.8 installation. Depending on t…EPSS 0.54%7.8CVE-2017-14030Moxa mxview unquoted search path vulnerabilityAn issue was discovered in Moxa MXview v2.8 and prior. The unquoted service path escalation vulnerability could allow an authorized user with file ac…EPSS 0.37%7.5CVE-2021-40392Moxa mxview cleartext transmission vulnerabilityAn information disclosure vulnerability exists in the Web Application functionality of Moxa MXView Series 3.2.4. Network sniffing can lead to a discl…EPSS 0.60%

Source: NIST National Vulnerability Database (record CVE-2021-40390), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.