CVE Catalog

CVE-2026-102759

MediumCVSS 6.3
Published: Updated: Translated: NVD NIST

Summary

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.

Risk Assessment

Risk of data integrity compromise in TLS connections, potentially allowing an attacker to inject or modify data undetected.

Recommendation

Update NetX Secure TLS to a patched version and consider disabling empty application records if feasible.

Related vulnerabilities

Original NVD description (English source)

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.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS