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CVE-2021-38456

30
FAUCET Score

CVE-2021-38456 describes a critical hard-coded password vulnerability in Moxa MXview Network Management software versions 3.x to 3.2.2, allowing unauthorized access through default accounts. With a CVSS score of 9.8 (CRITICAL), this vulnerability is easily exploitable over the network with low complexity, potentially leading to full compromise of confidentiality, integrity, and availability. While there is no evidence of active exploitation or public exploit code, the vulnerability has garnered some community and media attention, including a Threatpost article highlighting its critical nature for industrial networks.

Impacted Technologies

VendorProductVersion(s)CPE
>= 3.0, <= 3.2.2CPE matchmatch criteria
cpe:2.3:a:moxa:mxview:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.11%
Probability of exploitation in next 30 days
EPSS Percentile
62.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0111 is in the 48th percentile among its peer group of 36,897 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

us-cert.cisa.gov / ics/advisories/icsa-21-278-03
Third Party AdvisoryUS Government Resource