MXsecurity Hardcoded Credential

published 2023-09-02 3 y ago modified 2026-06-17 4 mo ago also EUVD-2023-43675

cvss: 7.5; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.4%; EPSS 0.4% chance of exploitation in 30 days, percentile 38%
public exploits: 0; none known

A vulnerability has been identified in MXsecurity versions prior to v1.0.1. The vulnerability may put the confidentiality and integrity of SSH communications at risk on the affected device. This vulnerability is attributed to a hard-coded SSH host key, which might facilitate man-in-the-middle attacks and enable the decryption of SSH traffic.

Patch / fix

links 1

moxa.com/en/support/product-support/security-advisory/mpsa-230403-m… advisory

CISA SSVC

Exploitation: none
Automatable: yes
Technical impact: partial
Assessed: 2 y ago (2024-09-30)

Exploit prediction

0.44% chance of exploitation in the next 30 days, higher than 38% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
NVD	3.1	5.9	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected products

Moxa MXsecurity Series

Classification

Weakness

CWE-321 Use of Hard-coded Cryptographic Key
CWE-798 Use of Hard-coded Credentials

References

moxa.com /en/support/product-support/security-advisory/mpsa-230403-mxsecurity-series-multiple-vulnerabilities
vendor-advisory, patch

Sources

CVE List CVE-2023-39982
NVD CVE-2023-39982

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Summary