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    2 vulnerabilities found for Hirschmann HiLCOS OpenBAT by Belden

    CVE-2021-4477 (GCVE-0-2021-4477)

    Vulnerability from nvd – Published: 2026-04-03 22:37 – Updated: 2026-04-06 13:17
    VLAI
    Title
    Hirschmann HiLCOS OpenBAT BAT450 IPv6 IPsec Firewall Bypass
    Summary
    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.
    Severity
    9.3 (Critical)
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
    9.1 (Critical)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
    SSVC
    Exploitation: none Automatable: yes Technical Impact: total
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-284 - Improper access control
    Assigner
    References
    Impacted products
    Vendor Product Version
    Belden Hirschmann HiLCOS OpenBAT Affected: 3.80-REL (custom)
    Affected: 8.90-REL (custom)
    Affected: 9.00-REL (custom)
    Affected: 9.00-RU1 (custom)
    Affected: 9.10-REL (custom)
    Affected: 9.12-REL (custom)
    Affected: 9.12-RU1 (custom)
    Affected: 9.12-RU2 (custom)
    Affected: 9.12-RU3 (custom)
    Affected: 9.12-RU4 (custom)
    Affected: 9.12-RU5 (custom)
    Affected: 9.12-RU6 (custom)
    Affected: 9.12-RU7 (custom)
    Affected: 9.12-RU8 (custom)
    Affected: 9.12-RU9 (custom)
    Affected: 9.13-REL (custom)
    Affected: 9.13-RU1 (custom)
    Affected: 10.12-REL (custom)
    Affected: 10.12-RU1 (custom)
    Unaffected: 10.12-RU2 (custom)
    		Create a notification for this product.
    Date Public
    2021-01-11 00:00
    Show details on NVD website
    To clipboard 

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    CVE-2021-4477 (GCVE-0-2021-4477)

    Vulnerability from cvelistv5 – Published: 2026-04-03 22:37 – Updated: 2026-04-06 13:17
    VLAI
    Title
    Hirschmann HiLCOS OpenBAT BAT450 IPv6 IPsec Firewall Bypass
    Summary
    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.
    Severity
    9.3 (Critical)
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
    9.1 (Critical)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
    SSVC
    Exploitation: none Automatable: yes Technical Impact: total
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-284 - Improper access control
    Assigner
    References
    Impacted products
    Vendor Product Version
    Belden Hirschmann HiLCOS OpenBAT Affected: 3.80-REL (custom)
    Affected: 8.90-REL (custom)
    Affected: 9.00-REL (custom)
    Affected: 9.00-RU1 (custom)
    Affected: 9.10-REL (custom)
    Affected: 9.12-REL (custom)
    Affected: 9.12-RU1 (custom)
    Affected: 9.12-RU2 (custom)
    Affected: 9.12-RU3 (custom)
    Affected: 9.12-RU4 (custom)
    Affected: 9.12-RU5 (custom)
    Affected: 9.12-RU6 (custom)
    Affected: 9.12-RU7 (custom)
    Affected: 9.12-RU8 (custom)
    Affected: 9.12-RU9 (custom)
    Affected: 9.13-REL (custom)
    Affected: 9.13-RU1 (custom)
    Affected: 10.12-REL (custom)
    Affected: 10.12-RU1 (custom)
    Unaffected: 10.12-RU2 (custom)
    		Create a notification for this product.
    Date Public
    2021-01-11 00:00
    Show details on NVD website
    To clipboard 

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