Hirschmann HiLCOS products OpenBAT, BAT450, WLC, BAT867 contains a firewall filtering vulnerability that fails to correctly filter IPv4 multicast and broadcast traffic when management IP address filtering is disabled, allowing configured filter rules to be bypassed. Attackers with network access can inject or observe multicast and broadcast packets that should have been blocked by the firewall.
History

Tue, 07 Apr 2026 00:00:00 +0000

Type Values Removed Values Added
First Time appeared Belden
Belden hirschmann Hilcos Bat450
Belden hirschmann Hilcos Bat867
Belden hirschmann Hilcos Openbat
Belden hirschmann Hilcos Wlc
Vendors & Products Belden
Belden hirschmann Hilcos Bat450
Belden hirschmann Hilcos Bat867
Belden hirschmann Hilcos Openbat
Belden hirschmann Hilcos Wlc

Mon, 06 Apr 2026 18:00:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Fri, 03 Apr 2026 22:45:00 +0000

Type Values Removed Values Added
Description Hirschmann HiLCOS products OpenBAT, BAT450, WLC, BAT867 contains a firewall filtering vulnerability that fails to correctly filter IPv4 multicast and broadcast traffic when management IP address filtering is disabled, allowing configured filter rules to be bypassed. Attackers with network access can inject or observe multicast and broadcast packets that should have been blocked by the firewall.
Title Hirschmann HiLCOS Layer-2 Firewall Multicast Broadcast Traffic Bypass
Weaknesses CWE-284
References
Metrics cvssV3_1

{'score': 5.4, 'vector': 'CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N'}

cvssV4_0

{'score': 5.9, 'vector': 'CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published: 2026-04-03T22:47:07.496Z

Updated: 2026-04-06T16:50:39.698Z

Reserved: 2026-04-03T17:40:03.508Z

Link: CVE-2017-20233

cve-icon Vulnrichment

Updated: 2026-04-06T16:50:29.107Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-04-03T23:16:59.763

Modified: 2026-04-07T13:20:55.200

Link: CVE-2017-20233

cve-icon Redhat

No data.