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CVE PROGRAM SOURCE RECORD8.7 High

CVE-2026-66842

BIG-IP and BIG-IQ Configuration utility vulnerability

Description

BIG-IP has a vulnerability where an authenticated user of any role may be able to create administrative user accounts through an undisclosed request to Traffic Management User Interface (TMUI). Impact: This vulnerability may allow an authenticated attacker with network access to the BIG-IP management interface to escalate privileges by creating administrative accounts on the BIG-IP system. There is no data plane exposure; this is a control plane issue only. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

F5 BIG-IP

Default version status: unknown

  • 21.1.0 to < 21.1.0.1affected
  • 21.0.0 to < 21.0.0.3affected
  • 17.5.0 to < 17.5.1.8affected
  • 17.1.0 to < 17.1.3.4affected

F5 BIG-IQ

Default version status: unaffected

  • 8.4.0 to < 8.4.2.1affected

References