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CVE-2026-88778 TCP Initial Sequence Number (ISN) prediction

🗓️ 27 Sep 2026 16:43:16Reported by NetScalerType 
cvelist
 cvelist
🔗 www.cve.org👁 4 Views

Predictable TCP ISN values in Citrix NetScaler ADC and Gateway before versions 14.1-73.37.

Related
Affected
Refs
[
  {
    "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"
  }
]

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