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TI-2026-75117 Aliases CVE-2026-109813

Hard-coded root CA private key in Moxa AIG-302 Series

Priority LOW 36CWE-321Published · Updated

Key facts

Attack vector
Adjacent network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Security bypass
Confidentiality · integrity · availability
High · High · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-321.

Summary

Moxa AIG-302 Series versions from 1.0.0 through 1.4.0 contain a shared root CA private key hard-coded in /usr/bin/sysman, which is a use of a hard-coded cryptographic key (CWE-321). An unauthenticated attacker with adjacent network access can use the exposed private key material to compromise the confidentiality and integrity of communications.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00163 5th percentileScored 2026-11-07
Fix Fixed AIG-302 Series (Moxa): 1.4.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
MoxaAIG-302 Series1.0.0 – 1.4.01.4.1Patch availableCNA
  • AIG-302 Series VendorMoxa Affected 1.0.0 – 1.4.0 Fixed in 1.4.1 Patch available CNA

Remediation

Upgrade Moxa AIG-302 Series to fixed version 1.4.1.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

  • Fix · CNA AIG-302 Series (Moxa) Fixed in 1.4.1

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Advisory ·

    Moxa AIG-302 Series — moxa.com/en/support/product-support/security-advisory/mpsa-…

    2 records Highest priority Priority LOW 2 LOW

    Other records, highest priority first

    • TI-2026-75116 Missing authorization on secret endpoints in Moxa AIG-302 SeriesPriority LOW 29
    Show all 2 records → Advisory →

Timeline

  1. 2026-10-16 Threatist record created from CVE-2026-109813
  2. 2026-10-16 CISA SSVC decision points changed
  3. 2026-10-16 Priority changed: MEDIUM → LOW

References

Advisory 1

  • TI-2021-17455 Hard-coded credentials in Moxa MXView Series CVSS 3.1CRITICAL 9.8
  • TI-2010-04465 Stack-based buffer overflow in a certain ActiveX control in MediaDBPlayback.DLL 2.2.0.5… CVSS 2.0HIGH 10.0
  • TI-2022-19087 A denial of service vulnerability exists in the web server functionality of Moxa SDS-3008… CVSS 3.1HIGH 7.5
  • TI-2016-07634 Missing brute-force protection in Moxa NPort CVSS 3.1CRITICAL 9.8
  • TI-2021-17457 Cleartext transmission of sensitive information in Moxa MXView Series CVSS 3.1HIGH 7.5
  • TI-2022-19326 Information disclosure in Moxa SDS-3008 Series Industrial Ethernet Switch CVSS 3.1MEDIUM 5.3
See all 328 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences