---
title: "CVE-2026-92853: NetX Secure - Out of Bounds Read"
description: "NetX Secure contains a buffer overflow caused by improper length decrement in TLS 1.3 Certificate-message parser, letting remote attackers read beyond buffer bounds, exploit requires crafted handshake message."
url: https://panop.io/threat-heartbeat/CVE-2026-92853/
---

# CVE-2026-92853 NetX Secure - Out of Bounds Read

NetX Secure contains a buffer overflow caused by improper length decrement in TLS 1.3 Certificate-message parser, letting remote attackers read beyond buffer bounds, exploit requires crafted handshake message.

CVSS base score 8.7 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-92853)

## Details

Type

Out of Bounds Read

Impact

Denial Of Service

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: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

20 October 2026

Updated

21 October 2026

Weakness

[CWE-125](https://cwe.mitre.org/data/definitions/125.html)

## Vendor fix

Update to the latest version with the TLS 1.3 Certificate-message parser fix.

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

- [https://nvd.nist.gov/vuln/detail/CVE-2026-92853](https://nvd.nist.gov/vuln/detail/CVE-2026-92853)
- [https://github.com/eclipse-threadx/netxduo/security/advisories/GHSA-893m-9g4r-4992](https://github.com/eclipse-threadx/netxduo/security/advisories/GHSA-893m-9g4r-4992)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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