CVE-2026-66842
CVE CVE-2026-66842EUVD EUVD-2026-70136Published 2026-09-02T15:40:53.000ZLast changed 2026-09-03T03:56:29.000ZCVSS 8.7
What the advisory describes
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.
Source: EUVD (ENISA), in the words of the advisory.
Products the advisory names
These come from the advisory itself, not from any check we performed.
- F5 — BIG-IP 21.0.0 <21.0.0.3; 21.1.0 <21.1.0.1; 17.5.0 <17.5.1.8; 17.1.0 <17.1.3.4
- F5 — BIG-IQ 8.4.0 <8.4.2.1
The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.
Carried in the product catalogue
An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.
- F5 — BIG-IP
- F5 — BIG-IQ
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