CVE-2025-6543

{"id": "CVE-2025-6543", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 9.8, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 3.9}], "cvssMetricV40": [{"type": "Secondary", "source": "secure@citrix.com", "cvssData": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 9.2, "Automatable": "NOT_DEFINED", "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "exploitMaturity": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "userInteraction": "NONE", "attackComplexity": "HIGH", "attackRequirements": "PRESENT", "privilegesRequired": "NONE", "subIntegrityImpact": "LOW", "vulnIntegrityImpact": "HIGH", "integrityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "subAvailabilityImpact": "LOW", "vulnAvailabilityImpact": "HIGH", "availabilityRequirement": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "subConfidentialityImpact": "LOW", "vulnConfidentialityImpact": "HIGH", "confidentialityRequirement": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED"}}]}, "published": "2025-06-25T13:15:27.293", "references": [{"url": "https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX694788", "tags": ["Vendor Advisory"], "source": "secure@citrix.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "secure@citrix.com", "description": [{"lang": "en", "value": "CWE-119"}]}], "descriptions": [{"lang": "en", "value": "Memory overflow vulnerability leading to unintended control flow and Denial of Service in NetScaler ADC and NetScaler Gateway when\u00a0configured as Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) OR AAA virtual server"}, {"lang": "es", "value": "Vulnerabilidad de desbordamiento de memoria que provoca un flujo de control no deseado y una denegaci\u00f3n de servicio en NetScaler ADC y NetScaler Gateway cuando se configuran como Gateway (servidor virtual VPN, proxy ICA, CVPN, proxy RDP) O servidor virtual AAA"}], "lastModified": "2025-07-01T18:19:45.547", "cisaActionDue": "2025-07-21", "cisaExploitAdd": "2025-06-30", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:fips:*:*:*", "vulnerable": true, "matchCriteriaId": "0F079648-790A-4D18-908D-25CA575C5B46", "versionEndExcluding": "13.1-37.236", "versionStartIncluding": "13.1"}, {"criteria": "cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:ndcpp:*:*:*", "vulnerable": true, "matchCriteriaId": "CF89AD2E-8A0A-43A9-9EEB-83D595576775", "versionEndExcluding": "13.1-37.236", "versionStartIncluding": "13.1"}, {"criteria": "cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:-:*:*:*", "vulnerable": true, "matchCriteriaId": "355DCB05-54E3-4C13-A74A-B27CE3F10597", "versionEndExcluding": "13.1-59.19", "versionStartIncluding": "13.1"}, {"criteria": "cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:-:*:*:*", "vulnerable": true, "matchCriteriaId": "4A26624D-7F3F-4FD7-AC50-C9BDCA656F7B", "versionEndExcluding": "14.1-47.46", "versionStartIncluding": "14.1"}], "operator": "OR"}]}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:citrix:netscaler_gateway:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "598029C6-734C-450C-A7EC-495C72819E88", "versionEndExcluding": "13.1-59.19", "versionStartIncluding": "13.1"}, {"criteria": "cpe:2.3:a:citrix:netscaler_gateway:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "D977C8AE-4B4E-474D-ABD6-F55F054E5B59", "versionEndExcluding": "14.1-47.46", "versionStartIncluding": "14.1"}], "operator": "OR"}]}], "sourceIdentifier": "secure@citrix.com", "cisaRequiredAction": "Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.", "cisaVulnerabilityName": "Citrix NetScaler ADC and Gateway Buffer Overflow Vulnerability"}