198 lines
11 KiB
JSON
198 lines
11 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-2026-16347",
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"assignerOrgId": "7d14cffa-0d7d-4270-9dc0-52cabd5a23a6",
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"state": "PUBLISHED",
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"assignerShortName": "icscert",
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"dateReserved": "2026-07-20T20:41:22.596Z",
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"datePublished": "2026-07-28T19:59:29.927Z",
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"dateUpdated": "2026-07-29T13:57:56.713Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "7d14cffa-0d7d-4270-9dc0-52cabd5a23a6",
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"shortName": "icscert",
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"dateUpdated": "2026-07-28T19:59:29.927Z"
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},
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"title": "Improper restriction of excessive authentication attempts in MikroTik RouterOS and Cloud Hosted Router",
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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-307",
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"description": "CWE-307 Improper restriction of excessive authentication attempts",
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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": "All versions"
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}
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],
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"defaultStatus": "affected"
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},
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{
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"vendor": "MikroTik",
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"product": "Cloud Hosted Router",
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"versions": [
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{
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"status": "affected",
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"version": "All versions"
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}
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],
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"defaultStatus": "affected"
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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 contains a weakness in its API authentication handling that lacks effective safeguards against excessive login attempts. The system does not enforce meaningful rate-limiting, account lockout, or source-based restrictions, allowing repeated authentication failures to proceed without defensive response. In some versions, a fixed per-connection delay is present, but it can be bypassed through concurrent sessions, resulting in continued high-volume attempts. This deficiency increases the risk that an attacker could eventually obtain valid credentials and gain unauthorized access to administrative services.",
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"supportingMedia": [
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{
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"type": "text/html",
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"base64": false,
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"value": "MikroTik RouterOS contains a weakness in its API authentication handling that lacks effective safeguards against excessive login attempts. The system does not enforce meaningful rate-limiting, account lockout, or source-based restrictions, allowing repeated authentication failures to proceed without defensive response. In some versions, a fixed per-connection delay is present, but it can be bypassed through concurrent sessions, resulting in continued high-volume attempts. This deficiency increases the risk that an attacker could eventually obtain valid credentials and gain unauthorized access to administrative services. <br>"
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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://www.cisa.gov/news-events/ics-advisories/icsa-26-209-05",
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"tags": [
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"government-resource"
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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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"cvssV3_1": {
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"version": "3.1",
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"attackVector": "ADJACENT_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": "HIGH",
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"baseSeverity": "HIGH",
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"baseScore": 8.8,
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"vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
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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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"cvssV4_0": {
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"attackVector": "ADJACENT",
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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": "HIGH",
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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": "HIGH",
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"baseScore": 8.7,
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"vectorString": "CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"
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}
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}
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],
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"workarounds": [
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{
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"lang": "en",
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"value": "No fix is currently available from MikroTik. Until a fix is available, MikroTik recommends that users adopt the following mitigations: Use a strong VPN or other additional protection layer if the API is exposed to public networks.\n\n* Configure the unsuccessful-attempt time range (0.1 to 0.5 seconds) in /ip service for all services, including the API, once available.\n\n* Connect initially from a trusted network (LAN) port only, then configure the router per your security requirements.\n\n* Restrict/limit access to management services from untrusted networks.\n\n* Apply firewall rules to control and restrict access to management services where possible.\n\n* Use long, randomly generated passwords rather than weak or default-simple ones, to keep the brute-force search space impractically large.\n\n* Keep the default randomly generated device password, or replace it with an equally strong one, since minimum complexity isn't enforced by default.\n\n\n\nUsers are encouraged to reach out to MikroTik (https://mikrotik.com/support) for further support.",
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"supportingMedia": [
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{
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"type": "text/html",
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"base64": false,
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"value": "No fix is currently available from MikroTik. Until a fix is available, MikroTik recommends that users adopt the following mitigations: Use a strong VPN or other additional protection layer if the API is exposed to public networks.\n<br>* Configure the unsuccessful-attempt time range (0.1 to 0.5 seconds) in /ip service for all services, including the API, once available.\n<br>* Connect initially from a trusted network (LAN) port only, then configure the router per your security requirements.\n<br>* Restrict/limit access to management services from untrusted networks.\n<br>* Apply firewall rules to control and restrict access to management services where possible.\n<br>* Use long, randomly generated passwords rather than weak or default-simple ones, to keep the brute-force search space impractically large.\n<br>* Keep the default randomly generated device password, or replace it with an equally strong one, since minimum complexity isn't enforced by default.\n<br>\n<br>Users are encouraged to reach out to MikroTik (https://mikrotik.com/support) for further support. "
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}
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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": "Andre Santos of União Geek reported this vulnerability to CISA.",
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"type": "finder"
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}
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],
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"source": {
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"discovery": "UNKNOWN"
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},
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"x_generator": {
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"engine": "Vulnogram 1.0.4"
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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": "2026-07-29T13:57:29.902200Z",
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"id": "CVE-2026-16347",
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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": "no"
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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": "2026-07-29T13:57:56.713Z"
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}
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}
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]
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}
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} |