MEDIUM
Hirschmann HiLCOS Layer-2 Firewall Multicast Broadcast Traffic Bypass
Published Apr 3, 2026
5.3
MEDIUMCVSS 4.0
EPSS 0.20%
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.
Affected products
-
- Version 0StatusaffectedConstraints<=9.14.5500-REL
- Version 0StatusaffectedConstraints-
- Version
-
- Version 0StatusaffectedConstraints<=9.10.5126-REL
- Version 0StatusaffectedConstraints<=9.12.5500-REL
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Belden | Hirschmann HiLCOS BAT867 | unaffected |
| |||||||||
| Belden | Hirschmann HiLCOS OpenBAT, BAT450, WLC | unaffected |
|
No data.
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Weaknesses (1)
References (2)
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner VulnCheck
Published Apr 3, 2026
Updated May 25, 2026
Reserved Apr 3, 2026
Link CVE-2017-20233
CISA Vulnrichment
Updated Apr 6, 2026