CVE-2017-20233: Belden Hirschmann Hilcos BAT867

Medium severity, CVSS 5.4. EPSS: 0.2% chance of exploitation in the next 30 days.

Hirschmann HiLCOS products OpenBAT, BAT450, WLC, BAT867 contains a firewall filtering vulnerability that fails to correctly filter IPv4 multicast and broadcast traffic when management IP address filtering is disabled, allowing configured filter rules to be bypassed. Attackers with network access can inject or observe multicast and broadcast packets that should have been blocked by the firewall.

Affected products

• Belden Hirschmann Hilcos BAT867: up to and including 9.14.5500-REL; version 0 only
• Belden Hirschmann Hilcos Openbat, BAT450, Wlc: up to and including 9.10.5126-REL; up to and including 9.12.5500-REL

Published 2026-04-03. Last modified 2026-07-21.