257 lines
10 KiB
JSON
257 lines
10 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2021-4477",
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"assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
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"state": "PUBLISHED",
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"assignerShortName": "VulnCheck",
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"dateReserved": "2026-04-03T16:46:37.018Z",
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"datePublished": "2026-04-03T22:37:45.879Z",
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"dateUpdated": "2026-04-06T13:17:07.744Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
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"shortName": "VulnCheck",
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"dateUpdated": "2026-04-03T22:37:45.879Z"
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},
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"title": "Hirschmann HiLCOS OpenBAT BAT450 IPv6 IPsec Firewall Bypass",
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"descriptions": [
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{
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"lang": "en",
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"value": "Hirschmann HiLCOS OpenBAT and BAT450 products contain a firewall bypass vulnerability in IPv6 IPsec deployments that allows traffic from VPN connections to bypass configured firewall rules. Attackers can exploit this vulnerability by establishing IPv6 IPsec connections (IKEv1 or IKEv2) while simultaneously using an IPv6 Internet connection to circumvent firewall policy enforcement."
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}
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],
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"datePublic": "2021-01-11T00:00:00.000Z",
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"problemTypes": [
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{
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"descriptions": [
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{
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"lang": "en",
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"cweId": "CWE-284",
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"description": "CWE-284 Improper access control",
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"type": "CWE"
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}
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]
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}
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],
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"affected": [
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{
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"vendor": "Belden",
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"product": "Hirschmann HiLCOS OpenBAT",
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"versions": [
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{
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"status": "affected",
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"version": "3.80-REL",
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"versionType": "custom"
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},
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{
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"status": "affected",
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"version": "8.90-REL",
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"versionType": "custom"
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},
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{
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"status": "affected",
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"version": "9.00-REL",
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"versionType": "custom"
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},
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{
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"status": "affected",
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"version": "9.00-RU1",
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"versionType": "custom"
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},
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{
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"status": "affected",
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"version": "9.10-REL",
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"versionType": "custom"
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},
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{
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"status": "affected",
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"version": "9.12-REL",
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"versionType": "custom"
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},
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{
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"status": "affected",
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"version": "9.12-RU1",
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"versionType": "custom"
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},
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{
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"status": "affected",
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"version": "9.12-RU2",
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"versionType": "custom"
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},
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{
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"status": "affected",
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"version": "9.12-RU3",
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"versionType": "custom"
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},
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{
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"status": "affected",
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"version": "9.12-RU4",
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"versionType": "custom"
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},
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{
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"status": "affected",
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"version": "9.12-RU5",
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"versionType": "custom"
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},
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{
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"status": "affected",
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"version": "9.12-RU6",
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"versionType": "custom"
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},
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{
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"status": "affected",
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"version": "9.12-RU7",
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"versionType": "custom"
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},
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{
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"status": "affected",
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"version": "9.12-RU8",
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"versionType": "custom"
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},
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{
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"status": "affected",
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"version": "9.12-RU9",
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"versionType": "custom"
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},
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{
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"status": "affected",
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"version": "9.13-REL",
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"versionType": "custom"
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},
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{
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"status": "affected",
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"version": "9.13-RU1",
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"versionType": "custom"
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},
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{
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"status": "affected",
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"version": "10.12-REL",
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"versionType": "custom"
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},
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{
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"status": "affected",
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"version": "10.12-RU1",
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"versionType": "custom"
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},
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{
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"status": "unaffected",
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"version": "10.12-RU2",
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"versionType": "custom"
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}
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],
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"defaultStatus": "unaffected"
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}
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],
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"metrics": [
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{
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"format": "CVSS",
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"scenarios": [
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{
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"lang": "en",
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"value": "GENERAL"
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}
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],
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"cvssV4_0": {
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"attackVector": "NETWORK",
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"attackComplexity": "LOW",
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"attackRequirements": "NONE",
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"privilegesRequired": "NONE",
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"userInteraction": "NONE",
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"vulnConfidentialityImpact": "HIGH",
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"subConfidentialityImpact": "NONE",
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"vulnIntegrityImpact": "HIGH",
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"subIntegrityImpact": "NONE",
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"vulnAvailabilityImpact": "NONE",
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"subAvailabilityImpact": "NONE",
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"exploitMaturity": "NOT_DEFINED",
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"Safety": "NOT_DEFINED",
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"Automatable": "NOT_DEFINED",
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"Recovery": "NOT_DEFINED",
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"valueDensity": "NOT_DEFINED",
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"vulnerabilityResponseEffort": "NOT_DEFINED",
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"providerUrgency": "NOT_DEFINED",
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"version": "4.0",
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"baseSeverity": "CRITICAL",
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"baseScore": 9.3,
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"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N"
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}
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},
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{
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"format": "CVSS",
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"scenarios": [
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{
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"lang": "en",
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"value": "GENERAL"
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}
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],
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"cvssV3_1": {
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"attackVector": "NETWORK",
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"attackComplexity": "LOW",
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"privilegesRequired": "NONE",
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"userInteraction": "NONE",
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"scope": "UNCHANGED",
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"confidentialityImpact": "HIGH",
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"integrityImpact": "HIGH",
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"availabilityImpact": "NONE",
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"version": "3.1",
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"baseSeverity": "CRITICAL",
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"baseScore": 9.1,
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"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N"
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}
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}
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],
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"references": [
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{
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"url": "https://assets.belden.com/m/5fd1a50fa50cb252/original/Belden-Security-Bulletin-BSECV-1v0-2019-09.pdf",
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"tags": [
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"vendor-advisory"
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]
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},
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{
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"url": "https://www.vulncheck.com/advisories/hirschmann-hilcos-openbat-bat450-ipv6-ipsec-firewall-bypass"
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}
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],
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"source": {
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"discovery": "EXTERNAL"
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}
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},
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"adp": [
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{
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"metrics": [
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{
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"other": {
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"type": "ssvc",
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"content": {
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"timestamp": "2026-04-06T13:16:56.315497Z",
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"id": "CVE-2021-4477",
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"options": [
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{
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"Exploitation": "none"
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},
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{
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"Automatable": "yes"
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},
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{
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"Technical Impact": "total"
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}
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],
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"role": "CISA Coordinator",
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"version": "2.0.3"
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}
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}
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2026-04-06T13:17:07.744Z"
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}
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}
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]
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}
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} |