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CVE-2026-42781 BIG-IP FastL4 virtual server vulnerability

🗓️ 13 May 2026 14:12:31Reported by f5Type 
cvelist
 cvelist
🔗 www.cve.org👁 65 Views

CVE-2026-42781: BIG-IP FastL4 vulnerability where local Ethernet traffic with embedded Packet Velocity Acceleration increases Traffic Management Microkernel resource utilization; End of Technical Support not evaluated.

Related
Affected
Refs
[
  {
    "defaultStatus": "unknown",
    "modules": [
      "All Modules"
    ],
    "platforms": [
      "r5000 rSeries",
      "r10000 rSeries",
      "r12000 rSeries",
      "BX110 blades on VELOS",
      "BX520 blades on VELOS"
    ],
    "product": "BIG-IP",
    "vendor": "F5",
    "versions": [
      {
        "lessThan": "*",
        "status": "unaffected",
        "version": "21.1.0",
        "versionType": "custom"
      },
      {
        "lessThan": "21.0.0.1",
        "status": "affected",
        "version": "21.0.0",
        "versionType": "custom"
      },
      {
        "lessThan": "17.5.1.4",
        "status": "affected",
        "version": "17.5.0",
        "versionType": "custom"
      },
      {
        "lessThan": "17.1.3.1",
        "status": "affected",
        "version": "17.1.0",
        "versionType": "custom"
      },
      {
        "lessThan": "*",
        "status": "unaffected",
        "version": "16.1.0",
        "versionType": "custom"
      }
    ]
  }
]

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