CVE-2026-92843

A missing bounds check in the TLS 1.3 Certificate-message parser of NetX Secure lets a malicious TLS 1.3 server trigger an unsigned-integer underflow and a subsequent heap out-of-bounds read in any peer that processes a remote Certificate message. It is reachable pre-authentication, during the normal handshake, before certificate verification completes.

Score

CVSS 4.0 8.7 High

Status

Awaiting Analysis - emo@eclipse.org

Published

2026-10-20

Last modified

2026-10-20

Weaknesses

CWE-125

Affected products

• Eclipse Threadx - Netx Duo (Eclipse Foundation)

References

• https://github.com/eclipse-threadx/netxduo/security/advisories/GHSA-4m85-f9qh-q3jv