CVE-2021-40390
CVSS v3
9.8
CRITICAL
EPSS Score
2.5 %
exploit probability, as of 2026-09-25
CISA KEV
No
known exploited
Exploitation
—
SSVC status
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.
Technical details
- Published
- 2022-04-14
Frequently asked questions
What is CVE-2021-40390?
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.
Is CVE-2021-40390 actively exploited?
Active exploitation of CVE-2021-40390 has not been confirmed. Its EPSS score was 2.5% on 2026-09-25, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2021-40390?
CVE-2021-40390 has a CVSS v3 base score of 9.8 (CRITICAL severity).
Is CVE-2021-40390 affecting your environment?
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