CVE-2026-111340

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-111340", "assignerOrgId": "50a63c94-1ea7-4568-8c11-eb79e7c5a2b5", "state": "PUBLISHED", "assignerShortName": "NetScaler", "dateReserved": "2026-10-15T20:47:37.490Z", "datePublished": "2026-11-13T03:07:04.587Z", "dateUpdated": "2026-11-13T03:07:04.587Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "50a63c94-1ea7-4568-8c11-eb79e7c5a2b5", "shortName": "NetScaler", "dateUpdated": "2026-11-13T03:07:04.587Z"}, "title": "Memory overflow in KBA (knowledge-based authentication) can lead to unpredictable or erroneous behavior or Denial of Service in Citrix NetScaler ADC and Citrix NetScaler Gateway", "datePublic": "2026-11-12T23:05:00.000Z", "affected": [{"vendor": "Citrix", "product": "NetScaler ADC", "versions": [{"status": "affected", "version": "0", "lessThan": "14.1-73.57", "versionType": "patch"}, {"status": "affected", "version": "0", "lessThan": "13.1-64.39", "versionType": "patch"}, {"status": "affected", "version": "0", "lessThan": "14.1-73.58 FIPS", "versionType": "patch"}, {"status": "affected", "version": "0", "lessThan": "13.1-37.293 FIPs and NDcPP", "versionType": "patch"}], "defaultStatus": "unaffected"}, {"vendor": "Citrix", "product": "NetScaler Gateway", "versions": [{"status": "affected", "version": "0", "lessThan": "14.1-73.57", "versionType": "patch"}, {"status": "affected", "version": "0", "lessThan": "13.1-64.39", "versionType": "patch"}], "defaultStatus": "unaffected"}], "descriptions": [{"lang": "en", "value": "Memory overflow in KBA (knowledge-based authentication) can lead to unpredictable or erroneous behavior or Denial of Service in Citrix NetScaler ADC and Citrix NetScaler Gateway.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "Memory overflow in KBA (knowledge-based authentication) can lead to unpredictable or erroneous behavior or Denial of Service in Citrix NetScaler ADC and Citrix NetScaler Gateway."}]}], "references": [{"url": "https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX697305"}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV4_0": {"attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "subConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "subIntegrityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "version": "4.0", "baseSeverity": "HIGH", "baseScore": 8.7, "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"}}], "source": {"discovery": "UNKNOWN"}, "x_generator": {"engine": "Vulnogram 1.0.5"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "NetScaler ADC", "vendor": "Citrix", "versions": [{"lessThan": "14.1-73.57", "status": "affected", "version": "0", "versionType": "patch"}, {"lessThan": "13.1-64.39", "status": "affected", "version": "0", "versionType": "patch"}, {"lessThan": "14.1-73.58 FIPS", "status": "affected", "version": "0", "versionType": "patch"}, {"lessThan": "13.1-37.293 FIPs and NDcPP", "status": "affected", "version": "0", "versionType": "patch"}]}, {"defaultStatus": "unaffected", "product": "NetScaler Gateway", "vendor": "Citrix", "versions": [{"lessThan": "14.1-73.57", "status": "affected", "version": "0", "versionType": "patch"}, {"lessThan": "13.1-64.39", "status": "affected", "version": "0", "versionType": "patch"}]}], "source": "50a63c94-1ea7-4568-8c11-eb79e7c5a2b5"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Memory overflow in KBA (knowledge-based authentication) can lead to unpredictable or erroneous behavior or Denial of Service in Citrix NetScaler ADC and Citrix NetScaler Gateway."}], "id": "CVE-2026-111340", "lastModified": "2026-11-13T04:17:36.537", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 8.7, "baseSeverity": "HIGH", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/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", "version": "4.0", "vulnAvailabilityImpact": "HIGH", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "50a63c94-1ea7-4568-8c11-eb79e7c5a2b5", "type": "Secondary"}]}, "published": "2026-11-13T04:17:36.537", "references": [{"source": "50a63c94-1ea7-4568-8c11-eb79e7c5a2b5", "url": "https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX697305"}], "sourceIdentifier": "50a63c94-1ea7-4568-8c11-eb79e7c5a2b5", "vulnStatus": "Received"}

{}

{}