CVE-2026-103416 Eclipse ThreadX NetX Duo - Out-of-Bounds Write

Eclipse ThreadX NetX Duo 6.5.1.202602 contains an out-of-bounds write caused by a TLS 1.3 handshake message larger than the cache in the handshake message cache, letting a malicious or compromised server corrupt memory before certificate authentication completes, exploit requires a malicious server to send crafted handshake messages.

CVSS base score 9.3 /10
Critical
CISA KEV
Not listed
Public exploit
None known
EPSS
0.21% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Out-of-Bounds Write
Impact
Denial Of Service, Remote Code Execution
CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/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
7 October 2026
Updated
15 October 2026
Weakness
CWE-787

Vendor fix

Update to the latest version of Eclipse ThreadX NetX Duo.

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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