220 lines
9.6 KiB
JSON
220 lines
9.6 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-2026-67278",
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"assignerOrgId": "4bb8329e-dd38-46c1-aafb-9bf32bcb93c6",
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"state": "PUBLISHED",
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"assignerShortName": "CERT-PL",
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"dateReserved": "2026-07-29T11:59:30.538Z",
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"datePublished": "2026-09-05T20:00:57.258Z",
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"dateUpdated": "2026-09-17T14:20:12.715Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "4bb8329e-dd38-46c1-aafb-9bf32bcb93c6",
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"shortName": "CERT-PL",
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"dateUpdated": "2026-09-17T14:20:12.715Z"
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},
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"title": "TLS server impersonation possible in Mikrotik RouterOS",
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"datePublic": "2026-09-05T00:00:00.000Z",
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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-347",
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"description": "CWE-347 Improper verification of cryptographic signature",
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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": "Mikrotik",
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"product": "RouterOS",
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"versions": [
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{
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"status": "affected",
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"version": "7.24",
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"lessThan": "7.24.3",
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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": "7.0.0",
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"lessThan": "7.23.6",
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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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{
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"operator": "OR",
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"operator": "OR",
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:a:mikrotik:routeros:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "7.24",
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"versionEndExcluding": "7.24.3"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:a:mikrotik:routeros:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "7.0.0",
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"versionEndExcluding": "7.23.6"
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}
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}
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]
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}
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],
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"descriptions": [
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{
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"lang": "en",
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"value": "MikroTik RouterOS accepts malformed RSA/PKCS#1 v1.5 signatures across RSA-based services, including TLS/X.509 certificate validation and SSH host-key authentication. Because its trust store includes an e=3 root CA, an attacker controlling or redirecting an outbound RouterOS TLS connection can use the root’s public certificate - without its private key - to forge a trusted intermediate and issue certificates for arbitrary hostnames, enabling TLS server impersonation. The same permissive verification also undermines RSA-based SSH authentication.\n\n\n\nThis issue affects only 7.x branch was fixed in versions: 7.23.6 (Long-term) and 7.24.3 (Stable).\nReleases 7.23.4 and 7.24.2 included an incomplete fix.",
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"supportingMedia": [
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{
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"type": "text/html",
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"value": "<p>MikroTik RouterOS accepts malformed RSA/PKCS#1 v1.5 signatures across RSA-based services, including TLS/X.509 certificate validation and SSH host-key authentication. Because its trust store includes an e=3 root CA, an attacker controlling or redirecting an outbound RouterOS TLS connection can use the root’s public certificate - without its private key - to forge a trusted intermediate and issue certificates for arbitrary hostnames, enabling TLS server impersonation. The same permissive verification also undermines RSA-based SSH authentication.</p><p>This issue affects only 7.x branch was fixed in versions: 7.23.6 (Long-term) and 7.24.3 (Stable).<br>Releases 7.23.4 and 7.24.2 included an incomplete fix.</p>"
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}
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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://cert.pl/en/posts/2026/09/mikrotik-routeros-cve",
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"tags": [
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"third-party-advisory"
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]
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},
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{
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"url": "https://cert.pl/en/posts/2026/09/vulnerabilities-in-mikrotik-routeros-actively-exploited/",
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"tags": [
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"technical-description"
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]
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},
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{
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"url": "https://npratley.net/reversing-mikrotiks-silent-patch-the-routeros-7-23-4-fix-they-wouldnt-explain/",
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"tags": [
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"exploit"
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]
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},
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{
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"url": "https://mikrotik.com/supportsec/september-2026-vulnerability/",
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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://forum.mikrotik.com/t/7-23-6-long-term-is-released/273139",
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"tags": [
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"release-notes"
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]
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},
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{
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"url": "https://forum.mikrotik.com/t/7-24-3-stable-is-released/273138",
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"tags": [
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"release-notes"
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]
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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": "PRESENT",
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"privilegesRequired": "NONE",
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"userInteraction": "NONE",
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"vulnConfidentialityImpact": "LOW",
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"subConfidentialityImpact": "NONE",
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"vulnIntegrityImpact": "LOW",
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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": "MEDIUM",
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"baseScore": 6.3,
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"vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N"
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}
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}
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],
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"credits": [
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{
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"lang": "en",
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"value": "Sławomir Rozbicki (CERT.PL)",
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"type": "finder"
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},
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{
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"lang": "en",
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"value": "Robert Żegleń",
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"type": "finder"
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}
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],
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"source": {
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"discovery": "INTERNAL"
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},
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"x_generator": {
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"engine": "Vulnogram 1.0.3"
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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": "2026-09-08T15:30:45.430794Z",
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"id": "CVE-2026-67278",
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"options": [
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{
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"Exploitation": "poc"
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},
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{
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"Automatable": "no"
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},
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{
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"Technical Impact": "partial"
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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": "2026-09-08T15:30:53.723Z"
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}
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}
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]
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}
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} |