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TI-2026-47463 Aliases CVE-2026-66842GHSA-cgm7-wqwh-h7hh

BIG-IP and BIG-IQ Configuration utility vulnerability

Priority MEDIUM 40CWE-918Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00468 40th percentileScored 2026-11-07
Fix Fixed BIG-IP (F5): 21.1.0.1, 21.0.0.3, 17.5.1.8 +1BIG-IQ (F5): 8.4.2.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
F5BIG-IP21.1.0 to before 21.1.0.1; 21.0.0 to before 21.0.0.3; 17.5.0 to before 17.5.1.8; 17.1.0 to before 17.1.3.421.1.0.1, 21.0.0.3, 17.5.1.8, 17.1.3.4Patch availableCNA
F5BIG-IQ8.4.0 to before 8.4.2.18.4.2.1Patch availableCNA
  • BIG-IP VendorF5 Affected 21.1.0 to before 21.1.0.1; 21.0.0 to before 21.0.0.3; 17.5.0 to before 17.5.1.8; 17.1.0 to before 17.1.3.4 Fixed in 21.1.0.1, 21.0.0.3, 17.5.1.8, 17.1.3.4 Patch available CNA
  • BIG-IQ VendorF5 Affected 8.4.0 to before 8.4.2.1 Fixed in 8.4.2.1 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:f5:big-iq_centralized_management:*:*:*:*:*:*:*:*——F5
  • cpe:2.3:a:f5:big-iq_centralized_management:*:*:*:*:*:*:*:* Versions — — ·F5

Remediation

  • Fix · CNA BIG-IP (F5) Fixed in 21.1.0.1, 21.0.0.3, 17.5.1.8, 17.1.3.4
  • Fix · CNA BIG-IQ (F5) Fixed in 8.4.2.1

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    F5 BIG-IP 17.1.3.4, 17.5.1.8 and 2 more versions

    2 records Highest priority Priority MEDIUM 1 MEDIUM, 1 LOW

    Other records, highest priority first

    • TI-2026-45009 BIG-IP Configuration utility vulnerabilityPriority LOW 12
    Show all 2 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-66842
  2. 2026-10-03 Alias added: GHSA-cgm7-wqwh-h7hh

References

Advisory 1

  • TI-2023-25230 BIG-IP Configuration utility unauthenticated remote code execution vulnerability KEVCVSS 3.1CRITICAL 9.8
  • TI-2022-01269 Missing authentication in F5 BIG-IP KEVCVSS 3.1CRITICAL 9.8
  • TI-2021-05850 Memory corruption in BIG-IP KEVCVSS 3.1CRITICAL 9.8
  • TI-2021-05845 Server-side request forgery in BIG-IP; BIG-IQ KEVCVSS 3.1CRITICAL 9.8
  • TI-2020-04820 Path traversal in BIG-IP KEVCVSS 3.1CRITICAL 9.8
  • TI-2014-05975 GNU Bash through 4.3 bash43-025 processes trailing strings after certain malformed… KEVCVSS 3.1CRITICAL 9.8
See all 1057 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences