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    "cveMetadata": {
        "cveId": "CVE-2017-20233",
        "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "state": "PUBLISHED",
        "assignerShortName": "VulnCheck",
        "dateReserved": "2026-04-03T17:40:03.508Z",
        "datePublished": "2026-04-03T22:47:07.496Z",
        "dateUpdated": "2026-05-25T23:40:56.325Z"
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                "dateUpdated": "2026-05-25T23:40:56.325Z"
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            "datePublic": "2017-05-08T00:00:00.000Z",
            "title": "Hirschmann HiLCOS Layer-2 Firewall Multicast Broadcast Traffic Bypass",
            "descriptions": [
                {
                    "lang": "en",
                    "value": "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."
                }
            ],
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                    "vendor": "Belden",
                    "product": "Hirschmann HiLCOS OpenBAT, BAT450, WLC",
                    "versions": [
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                            "status": "affected",
                            "version": "0",
                            "versionType": "semver",
                            "lessThanOrEqual": "9.10.5126-REL"
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                    "vendor": "Belden",
                    "product": "Hirschmann HiLCOS BAT867",
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                            "status": "affected",
                            "version": "0",
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                            "lessThanOrEqual": "9.14.5500-REL"
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                            "lang": "en",
                            "cweId": "CWE-284",
                            "description": "CWE-284  Improper access control",
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                        "attackVector": "ADJACENT_NETWORK",
                        "attackComplexity": "LOW",
                        "privilegesRequired": "NONE",
                        "userInteraction": "NONE",
                        "scope": "UNCHANGED",
                        "confidentialityImpact": "LOW",
                        "integrityImpact": "LOW",
                        "availabilityImpact": "NONE",
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                        "baseSeverity": "MEDIUM",
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                        "userInteraction": "NONE",
                        "vulnConfidentialityImpact": "LOW",
                        "subConfidentialityImpact": "NONE",
                        "vulnIntegrityImpact": "LOW",
                        "subIntegrityImpact": "NONE",
                        "vulnAvailabilityImpact": "NONE",
                        "subAvailabilityImpact": "NONE",
                        "Safety": "NOT_DEFINED",
                        "Automatable": "NOT_DEFINED",
                        "Recovery": "NOT_DEFINED",
                        "valueDensity": "NOT_DEFINED",
                        "vulnerabilityResponseEffort": "NOT_DEFINED",
                        "providerUrgency": "NOT_DEFINED",
                        "version": "4.0",
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            "source": {
                "discovery": "EXTERNAL"
            },
            "references": [
                {
                    "url": "https://assets.belden.com/m/11a07596f0bf1018/original/Security-Bulletin-IPv4-Multicast-HiLCOS-Layer-2-Firewall-BSECV-2017-03.pdf",
                    "tags": [
                        "vendor-advisory"
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                },
                {
                    "url": "https://www.vulncheck.com/advisories/hirschmann-hilcos-layer-2-firewall-multicast-broadcast-traffic-bypass",
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        "adp": [
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                    {
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                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-04-06T16:50:22.722467Z",
                                "id": "CVE-2017-20233",
                                "options": [
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                                        "Exploitation": "none"
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                                        "Technical Impact": "partial"
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                "title": "CISA ADP Vulnrichment",
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