CVE-2017-20233
Received Received - Intake
Firewall Filtering Bypass in Hirschmann HiLCOS via Multicast Traffic

Publication date: 2026-04-03

Last updated on: 2026-04-03

Assigner: VulnCheck

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.
CVSS Scores
EPSS Scores
Probability:
Percentile:
Meta Information
Published
2026-04-03
Last Modified
2026-04-03
Generated
2026-06-16
AI Q&A
2026-04-04
EPSS Evaluated
2026-06-15
NVD
CVE-2017-20233
EUVD
EUVD-2017-18955
Affected Vendors & Products
Showing 4 associated CPEs
Vendor Product Version / Range
hirschmann hilcos_openbat *
hirschmann hilcos_bat450 *
hirschmann hilcos_wlc *
hirschmann hilcos_bat867 *
Helpful Resources
Exploitability
CWE
CWE Icon
KEV
KEV Icon
CWE ID Description
CWE-284 The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.
Attack-Flow Graph
AI Quick Actions
Instant insights powered by AI
Executive Summary

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

Impact Analysis

The impact of this vulnerability is that attackers with network access can bypass firewall rules to inject or observe multicast and broadcast traffic that should have been blocked. This can lead to unauthorized network traffic being sent or received, potentially exposing sensitive information or allowing malicious traffic to propagate within the network.

Chat Assistant
Ask questions about this CVE
Hi! I’m here to help you understand CVE-2017-20233. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70
EPSS Chart