Out-of-bounds read in NetX Duo - CVE-2026-106464
Published: November 9, 2026
Vulnerability identifier: #VU162966
CSH Severity: Medium
CVSS v4: 8.7 [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]
CVE-ID: CVE-2026-106464
CWE-ID: CWE-125
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows an unauthenticated remote attacker to trigger out-of-bounds reads during TLS certificate signature verification in NetX Duo.
The vulnerability exists due to an unchecked length subtraction in NetX Secure's X.509 parser when a certificate contains an empty signature BIT STRING, producing an oversized signature length. An unauthenticated remote attacker can supply this certificate to a TLS client or a TLS server configured to request client certificates, causing signature verification to read beyond the certificate buffer before authentication completes.
Affected software
NetX Duo
How to mitigate CVE-2026-106464
Install security update from vendor's website.
NetX Duo - update to 6.5.2.202603