CVE-2026-102759
Medium
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.
SeverityMedium
CVSS6.3
Exploit probability—
ProductNetX Duo
PublishedSep 29, 2026
First seenSep 29, 2026
Weakness typeCWE-354CWE-354
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Eclipse Foundation NetX Duo | 6.2.0 ≤ v ≤ 6.5.1.202602 | — |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
In the Intelligence 360 plan
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.