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TI-2026-16939 Aliases CVE-2026-20916GHSA-wph4-q4m8-f794

BIG-IQ iControl REST vulnerability

Priority LOW 32CWE-22Published · Updated

Key facts

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

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

Summary

An authenticated iControl REST user with low privileges can create or modify arbitrary files through an undisclosed iControl REST endpoint on the BIG-IQ system.  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 0.00366 30th percentileScored 2026-11-07
Fix Fixed BIG-IQ (F5): 8.4.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

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-IQ8.4.0 to before 8.4.18.4.1Patch availableCNA
  • BIG-IQ VendorF5 Affected 8.4.0 to before 8.4.1 Fixed in 8.4.1 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:f5:big-iq_centralized_management:8.4.0:*:*:*:*:*:*:*8.4.0VulnerableF5
  • cpe:2.3:a:f5:big-iq_centralized_management:8.4.0:*:*:*:*:*:*:* Versions 8.4.0 Vulnerable ·F5

Remediation

  • Fix · CNA BIG-IQ (F5) Fixed in 8.4.1

Fixed in the same release

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

  • Release ·

    F5 BIG-IQ 8.4.1

    4 records Highest priority Priority MEDIUM 1 MEDIUM, 3 LOW

    Other records, highest priority first

    • TI-2026-30352 BIG-IP and BIG-IQ Configuration utility vulnerabilityPriority MEDIUM 40
    • TI-2026-29832 BIG-IP QKView vulnerabilityPriority LOW 31
    • TI-2026-30350 iControl REST and tmsh vulnerabilityPriority LOW 30
    Show all 4 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-20916
  2. 2026-10-03 Alias added: GHSA-wph4-q4m8-f794

References

Patch 1

  • TI-2021-05845 Server-side request forgery in BIG-IP; BIG-IQ KEVCVSS 3.1CRITICAL 9.8
  • TI-2018-10499 Integer overflow in backstage kernel KEVCVSS 3.0HIGH 7.8
  • TI-2022-20025 iControl SOAP vulnerability CVSS 3.1HIGH 8.8
  • TI-2014-00189 The n_tty_write function in drivers/tty/n_tty.c in the Linux kernel through 3.14.3 does… KEVCVSS 3.1MEDIUM 5.5
  • TI-2019-08571 Resource allocation without limits in Linux kernel CVSS 3.1HIGH 7.5
  • TI-2002-02356 The Diffie-Hellman Key Agreement Protocol allows remote attackers (from the client side)… CVSS 3.1HIGH 7.5
See all 84 →

Sources

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