Belden Hirschmann HiLCOS OpenBAT vulnerabilities

🔔 Create alert RSS Version checker

Published CVEs affecting Belden Hirschmann HiLCOS OpenBAT: 1 record(s), with affected versions and fixes.

CVE-2021-4477 Critical · 9.1 CWE-284 Apr 3, 2026

Hirschmann HiLCOS OpenBAT and BAT450 IPv6 IPsec Firewall Bypass

Hirschmann HiLCOS OpenBAT and BAT450 products contain a firewall bypass vulnerability in IPv6 IPsec deployments that allows traffic from VPN connections to bypass configured firewall rules. Attackers can exploit this vulnerability by establishing IPv6 IPsec connections (IKEv1 or IKEv2) while simultaneously using an IPv6 Internet connection to circumvent firewall policy enforcement.