CVE-2026-92853

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

Published Oct 20, 2026 CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed
Description
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Eclipse
Eclipse threadx Netx Duo
Vendors & Products Eclipse
Eclipse threadx Netx Duo
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description 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.
Title Out-of-bounds Read via a Zero-length TLS 1.3 Certificate Message in NetX Secure
Weaknesses CWE-125
CWE-191
References
Metrics cvssV4_0

{'score': 8.7, '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:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
eclipse
Published
Updated
Oct 20, 2026, 5:02 PM
Reserved
Sep 23, 2026, 1:43 PM
Status
Awaiting Analysis
Published
Oct 20, 2026, 4:17 PM
Modified
Oct 20, 2026, 7:48 PM