{"schema_version":"1","data":[{"id":3825,"advisory_id":"983910a9-db27-4c43-b461-148310c6b2fa","revision":1,"source_id":"core-cve","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-88778","source_published_at":"2026-09-27T16:43:16.503+00:00","published_at":"2026-10-24T21:41:08.027095+00:00","extraction_method":"structured","technologies":["adc","core-cve","gateway"],"cve_ids":["CVE-2026-88778"],"event_types":["advisory"],"payload":{"kind":"advisory","title":"TCP Initial Sequence Number (ISN) prediction","summary":"Predictable exact value from previous values vulnerability in Citrix NetScaler ADC and Citrix NetScaler Gateway. 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.","evidence":"cve:CVE-2026-88778","products":[{"name":{"value":"ADC","evidence":"/containers/cna/affected/0/product"},"prerequisites":[],"fixed_versions":[],"affected_versions":[]},{"name":{"value":"Gateway","evidence":"/containers/cna/affected/1/product"},"prerequisites":[],"fixed_versions":[],"affected_versions":[]}],"severity":"high","structured":{"id":"CVE-2026-88778","aliases":["CVE-2026-88778"],"metrics":[{"format":"CVSS","cvssV4_0":{"Safety":"NOT_DEFINED","version":"4.0","Recovery":"NOT_DEFINED","baseScore":8.8,"Automatable":"NOT_DEFINED","attackVector":"NETWORK","baseSeverity":"HIGH","valueDensity":"NOT_DEFINED","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","exploitMaturity":"NOT_DEFINED","providerUrgency":"NOT_DEFINED","userInteraction":"NONE","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","subIntegrityImpact":"LOW","vulnIntegrityImpact":"HIGH","subAvailabilityImpact":"LOW","vulnAvailabilityImpact":"HIGH","subConfidentialityImpact":"LOW","vulnConfidentialityImpact":"LOW","vulnerabilityResponseEffort":"NOT_DEFINED"},"scenarios":[{"lang":"en","value":"GENERAL"}]}],"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"}],"modified":"2026-09-29T16:35:06.769Z","provider":"cve","references":["https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX697096"],"provider_metadata":{"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2026-88778","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"total"}],"version":"2.0.3","timestamp":"2026-09-29T16:34:20.349812Z"}}}],"providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-09-29T16:35:06.769Z"}}],"cna":{"orgId":"50a63c94-1ea7-4568-8c11-eb79e7c5a2b5","shortName":"NetScaler","dateUpdated":"2026-09-27T16:43:16.503Z"}}},"related_cves":[{"value":"CVE-2026-88778","evidence":"/cveMetadata/cveId"}],"security_relevant":true,"severity_evidence":"/containers/cna/metrics"}}],"next_after":3825,"next_before":3825}