NetX Secure TLS accepts an empty application-data record without verifying its message authentication code. In `_nx_secure_verify_mac`, a decrypted application record whose length equals the negotiated MAC size is treated as valid and returns success after advancing the receive sequence number. The received MAC is never generated or compared.



Empty TLS application-data records are legal, and are commonly emitted by TLS 1.0 implementations as a BEAST mitigation.

Attack Vector Network

Attack Complexity High

Privileges Required None

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact Low

Vulnerable System Availability Impact Low

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Exploitation none

Automatable no

Technical Impact partial

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Eclipse Foundation NetX Duo unaffected
Version Status Constraints
6.2.0 affected ≤ 6.5.1.202602
6.5.2.202603 unaffected —

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Project Subscriptions

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Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/eclipse-threadx/netxduo/security/advisories/GHSA-m7j3-vh25-xc8p cve-icon cve-icon
History

Wed, 30 Sep 2026 01:00:00 +0000

Type Values Removed Values Added
Title NetX Duo TLS MAC Verification Bypass via Empty Application-Data Record

Tue, 29 Sep 2026 21:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Tue, 29 Sep 2026 17:45:00 +0000

Type Values Removed Values Added
Description NetX Secure TLS accepts an empty application-data record without verifying its message authentication code. In `_nx_secure_verify_mac`, a decrypted application record whose length equals the negotiated MAC size is treated as valid and returns success after advancing the receive sequence number. The received MAC is never generated or compared. Empty TLS application-data records are legal, and are commonly emitted by TLS 1.0 implementations as a BEAST mitigation.
Weaknesses CWE-354
References
Metrics cvssV4_0

{'score': 6.3, 'vector': 'CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: eclipse

Published:

Updated: 2026-09-29T21:01:58.130Z

Reserved: 2026-09-29T16:21:58.818Z

Link: CVE-2026-102759

cve-icon Vulnrichment

Updated: 2026-09-29T20:59:43.250Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-09-29T18:17:13.177

Modified: 2026-09-29T22:17:08.373

Link: CVE-2026-102759

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-30T00:45:17Z

Weaknesses