CVE-2026-109813 PUBLISHED

Shared Hard-coded Root CA Private Key

Assigner: Moxa
Reserved: 13.10.2026 Published: 16.10.2026 Updated: 16.10.2026

A hard-coded cryptographic key vulnerability exists in the /usr/bin/sysman of some of Moxa's industrial computing products. An unauthenticated attacker with adjacent network access could exploit the exposed private key material to compromise the confidentiality and integrity of communications.

Metrics

CVSS 4.0

CVSS Vector: CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
CVSS Score: 8.6

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Adjacent	Confidentiality	High	Confidentiality	None
Attack Complexity	Low	Integrity	High	Integrity	None
Attack Requirements	None	Availability	None	Availability	None
Privileges Required	None
User Interaction	None

CVSS 4.0

Product Status

Vendor	Moxa
Product	AIG-302 Series
Versions	Default: unaffected affected from 1.0.0 to 1.4.0 (incl.) Version 1.4.1 is unaffected

Solutions

Please refer to Moxa Security Advisory: https://www.moxa.com/en/support/product-support/security-advisory/mpsa-262560-cve-2026-109812,-cve-2026-109813-vulnerabilities-in-industrial-computing-products

Credits

Ievgen Bondarenko finder

References

https://www.moxa.com/en/support/product-support/security-advisory/mpsa-262560-cve-2026-109812,-cve-2026-109813-vulnerabilities-in-industrial-computing-products

Problem Types

CWE-321: Use of Hard-coded Cryptographic Key CWE

Impacts

CAPEC-37: Retrieve Embedded Sensitive Data