CVE-2026-106465
CVE-2026-106465
This page contains facts from public vulnerability sources. Check the original advisory before updating.
The NetX Secure DTLS server sends a HelloVerifyRequest carrying a freshly generated cookie, but never checks the cookie a client returns. The ClientHello parser copies the client's cookie bytes over the value the server issued, and the server then decides whether the client has been verified from the cookie's length alone. A peer that puts any single cookie byte in its first ClientHello skips the verification exchange entirely, so the server has no return-routability check and completes handshakes for forged source addresses.
CVSS 8.7 · High · EPSS 0.3% · Fix available
- Published
- Updated
Affected products and versions
netx duo
- Versions
- ≥ 0, ≤ 6.5.2.202603: Affected (custom)
- 6.5.2.202603a: Not affected
Update to 6.5.2.202603a