CVE-2026-106464
High
Description
`_nx_secure_x509_parse_signature_data` computes the certificate signature's length as `tlv_length - 1` without first checking that `tlv_length` is non-zero. A certificate whose signature is an empty ASN.1 BIT STRING therefore parses successfully and leaves the certificate holding a signature length of `0xFFFFFFFF` and a signature pointer one byte past the end of the buffer. Certificates are parsed from the peer during the TLS handshake, so the input is remote and unauthenticated.
SeverityHigh
CVSS8.7
Exploit probability—
ProductNetX Duo
PublishedOct 14, 2026
First seenOct 14, 2026
Weakness typeCWE-125Out-of-bounds readCWE-191CWE-191
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 | v ≤ 6.5.2.202603 | — |
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