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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
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
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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