CVE-2026-111459 Moxa Remote Connect Suite - Weak Cryptography

Moxa Remote Connect Suite (MRC Client) contains an improper certificate validation vulnerability caused by insufficient validation of server certificates, letting unauthenticated attackers with on-path access impersonate trusted servers and conduct man-in-the-middle attacks, exploit requires attacker to have on-path network access.

CVSS base score 7.6 /10
High
CISA KEV
Not listed
Public exploit
None known
EPSS
0.17% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Weak Cryptography
Impact
Man In The Middle, Information Disclosure, Data Tampering
CVSS vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Published
27 October 2026
Updated
29 October 2026
Weakness
CWE-295

Vendor fix

Update to the latest version with proper certificate validation.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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