CVE-2021-4477
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2021
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
Hirschmann HiLCOS OpenBAT 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.
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Hirschmann HiLCOS OpenBAT
- Vendor
- Belden
- Product
- Hirschmann HiLCOS OpenBAT
- Platforms
- Unknown
- Default status
unaffected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 3.80-REL | affected | custom | Unavailable | Unavailable | None listed |
| 8.90-REL | affected | custom | Unavailable | Unavailable | None listed |
| 9.00-REL | affected | custom | Unavailable | Unavailable | None listed |
| 9.00-RU1 | affected | custom | Unavailable | Unavailable | None listed |
| 9.10-REL | affected | custom | Unavailable | Unavailable | None listed |
| 9.12-REL | affected | custom | Unavailable | Unavailable | None listed |
| 9.12-RU1 | affected | custom | Unavailable | Unavailable | None listed |
| 9.12-RU2 | affected | custom | Unavailable | Unavailable | None listed |
| 9.12-RU3 | affected | custom | Unavailable | Unavailable | None listed |
| 9.12-RU4 | affected | custom | Unavailable | Unavailable | None listed |
| 9.12-RU5 | affected | custom | Unavailable | Unavailable | None listed |
| 9.12-RU6 | affected | custom | Unavailable | Unavailable | None listed |
| 9.12-RU7 | affected | custom | Unavailable | Unavailable | None listed |
| 9.12-RU8 | affected | custom | Unavailable | Unavailable | None listed |
| 9.12-RU9 | affected | custom | Unavailable | Unavailable | None listed |
| 9.13-REL | affected | custom | Unavailable | Unavailable | None listed |
| 9.13-RU1 | affected | custom | Unavailable | Unavailable | None listed |
| 10.12-REL | affected | custom | Unavailable | Unavailable | None listed |
| 10.12-RU1 | affected | custom | Unavailable | Unavailable | None listed |
| 10.12-RU2 | unaffected | custom | Unavailable | Unavailable | None listed |