{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-88778","assignerOrgId":"50a63c94-1ea7-4568-8c11-eb79e7c5a2b5","state":"PUBLISHED","assignerShortName":"NetScaler","dateReserved":"2026-09-10T07:14:57.370Z","datePublished":"2026-09-27T16:43:16.503Z","dateUpdated":"2026-09-27T16:43:16.503Z"},"containers":{"cna":{"providerMetadata":{"orgId":"50a63c94-1ea7-4568-8c11-eb79e7c5a2b5","shortName":"NetScaler","dateUpdated":"2026-09-27T16:43:16.503Z"},"title":"TCP Initial Sequence Number (ISN) prediction","datePublic":"2026-09-27T15:30:00.000Z","problemTypes":[{"descriptions":[{"lang":"en","cweId":"CWE-342","description":"CWE-342 Predictable exact value from previous values","type":"CWE"}]}],"affected":[{"vendor":"Citrix NetScaler","product":"ADC","versions":[{"status":"affected","version":"0","lessThan":"14.1-73.37","versionType":"Patch"},{"status":"affected","version":"0","lessThan":"13.1-64.23","versionType":"Patch"},{"status":"affected","version":"0","lessThan":"14.1-73.37 FIPS","versionType":"Patch"},{"status":"affected","version":"0","lessThan":"13.1.37.279 FIPS and NDcPP","versionType":"Patch"}],"defaultStatus":"unaffected"},{"vendor":"Citrix NetScaler","product":"Gateway","versions":[{"status":"affected","version":"0","lessThan":"14.1-73.37","versionType":"Patch"},{"status":"affected","version":"0","lessThan":"13.1-64.23","versionType":"Patch"}],"defaultStatus":"unaffected"}],"descriptions":[{"lang":"en","value":"Predictable exact value from previous values vulnerability in Citrix NetScaler ADC and Citrix NetScaler Gateway.\n\nThis issue affects ADC: before 14.1-73.37, before 13.1-64.23, before 14.1-73.37 FIPS, and before 13.1.37.279 FIPS and NDcPP; Gateway: before 14.1-73.37 and before 13.1-64.23.","supportingMedia":[{"type":"text/html","base64":false,"value":"Predictable exact value from previous values vulnerability in Citrix NetScaler ADC and Citrix NetScaler Gateway.<p>This issue affects ADC: before 14.1-73.37, before 13.1-64.23, before 14.1-73.37 FIPS, and before 13.1.37.279 FIPS and NDcPP; Gateway: before 14.1-73.37 and before 13.1-64.23.</p>"}]}],"references":[{"url":"https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX697096"}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"LOW","subConfidentialityImpact":"LOW","vulnIntegrityImpact":"HIGH","subIntegrityImpact":"LOW","vulnAvailabilityImpact":"HIGH","subAvailabilityImpact":"LOW","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":8.8,"vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:H/SC:L/SI:L/SA:L"}}],"source":{"discovery":"UNKNOWN"},"x_generator":{"engine":"Vulnogram 1.0.5"}}}}