CVE-2017-20233Hirschmann HiLCOS Layer-2 Firewall Multicast Broadcast Traffic Bypass
Updated under an hour ago ()
Does this affect you?
It affects Belden Hirschmann HiLCOS OpenBAT, BAT450, WLC and 1 other product. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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Free account, 1 product
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.
- CVSS
- 5.4 MEDIUM (v3.1, CNA)CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
- Weakness (CWE)
- CWE-284
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- VulnCheck
- NVD analysis
- Awaiting Analysis
- Record last updated
- May 25, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Belden Hirschmann HiLCOS OpenBAT, BAT450, WLC belden:hirschmann_hilcos_openbat_bat450_wlc (from the name) | through 9.10.5126-REL; through 9.12.5500-REL | CNA record |
Belden Hirschmann HiLCOS BAT867 belden:hirschmann_hilcos_bat867 (from the name) | through 9.14.5500-REL; 0 | CNA record |
References
- https://assets.belden.com/m/11a07596f0bf1018/original/Security-Bulletin-IPv4-Multicast-HiLCOS-Layer-2-Firewall-BSECV-2017-03.pdfvendor-advisory
- https://www.vulncheck.com/advisories/hirschmann-hilcos-layer-2-firewall-multicast-broadcast-traffic-bypassthird-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.