CVE-2026-92853

CVE-2026-92853 · Out-of-bounds Read via a Zero-length TLS 1.3 Certificate Message in NetX Secure

This page contains facts from public vulnerability sources. Check the original advisory before updating.

The TLS 1.3 Certificate-message parser in NetX Secure decrements the message length to skip a context byte without first establishing that the message has a byte to skip. A zero-length Certificate message therefore wraps the unsigned length to `0xFFFFFFFF`, which makes the bounds check that follows vacuous and sends the parser reading past the session packet buffer. The trigger is a four-byte handshake header and requires no cryptographic validity. It is reachable pre-authentication.

CVSS 8.7 · High · EPSS 0.3%

Published

2026-10-20T15:10:08.102Z

Updated

2026-10-20T17:02:19.980Z

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