CVE-2026-106465 NetX Secure DTLS - Authentication Bypass

NetX Secure DTLS server contains a broken authentication caused by improper cookie verification in ClientHello parser, letting attackers bypass return-routability checks and complete handshakes with forged source addresses, exploit requires sending crafted ClientHello with any single cookie byte.

CVSS base score 8.7 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
View the NVD record ↗

Details

Type
Authentication Bypass
Impact
Broken Authentication
CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/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
14 October 2026
Updated
15 October 2026
Weakness
CWE-290

Vendor fix

Update to the latest version with proper cookie verification implemented.

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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