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CVE-2021-4477: Improper Access Control

🗓️ 03 Apr 2026 00:00:00Reported by Rapid7Type 
rapid7
 rapid7
🔗 www.rapid7.com👁 2 Views

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 ...

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24 Jul 2026 00:00Current
CVSS 3.19.1
CVSS 49.3
EPSS0.00319
SSVC
2