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Vulnerabilities/CVE-2026-39459Public Intelligence Dossier
Source: f5 · Limited verification•Last verified: •Collection Degraded
CVE-2026-39459Unknown / EvaluatingHIGH (raw)CVSS 8.6CWE-272

A vulnerability exists in iControl REST and the TMOS Shell (tmsh) where a highly privileged, authenticated attacker with at least the Manager role can create configuration objects that allow running arbitrary commands

Published: 13 May 2026•Last updated: 26 Oct 2026, 10:40 PM IST•Source identifier: f5sirt@f5.com
Dossier completeness: source-provided sections 2 / 3 · rule guidance not available. Missing source facts count as incomplete.
Official source
CISA KEV catalog
Unknown
KEV status was not determined.
CVSS score
8.6HIGH (raw)
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Metric sourcef5sirt@f5.com
EPSS probability
0.3%0.003
Percentile17th
Weakness type
CWE-272
No further CWE recorded
Remediation
Patch status unknown
No fixed version or KB recorded

Why It Matters

Analysis dossier

Why It Matters

A vulnerability exists in iControl REST and the TMOS Shell (tmsh) where a highly privileged, authenticated attacker with at least the Manager role can create configuration objects that allow running arbitrary commands. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

SOC priority

High

Actively exploited (source statement)

Unknown

Publicly disclosed

Unknown

Risk basis: Microsoft or Microsoft-managed product relevance; HIGH severity; Source severity; no confirmed exploitation signal

Affected Products & Remediation

21 source-backed products
Affected products and versions (source)
  • f5 big-ip access policy manager · >= 17.1.0 <= 17.1.3; >= 17.5.0 <= 17.5.1 · NVD CPE · Source
  • f5 big-ip advanced firewall manager · >= 17.1.0 <= 17.1.3; >= 17.5.0 <= 17.5.1 · NVD CPE · Source
  • f5 big-ip advanced web application firewall · >= 17.1.0 <= 17.1.3; >= 17.5.0 <= 17.5.1 · NVD CPE · Source
  • f5 big-ip analytics · >= 17.1.0 <= 17.1.3; >= 17.5.0 <= 17.5.1 · NVD CPE · Source
  • f5 big-ip application acceleration manager · >= 17.1.0 <= 17.1.3; >= 17.5.0 <= 17.5.1 · NVD CPE · Source
  • f5 big-ip application security manager · >= 17.1.0 <= 17.1.3; >= 17.5.0 <= 17.5.1 · NVD CPE · Source
  • f5 big-ip application visibility and reporting · >= 17.1.0 <= 17.1.3; >= 17.5.0 <= 17.5.1 · NVD CPE · Source
  • f5 big-ip automation toolchain · >= 17.1.0 <= 17.1.3; >= 17.5.0 <= 17.5.1 · NVD CPE · Source
  • f5 big-ip carrier-grade nat · >= 17.1.0 <= 17.1.3; >= 17.5.0 <= 17.5.1 · NVD CPE · Source
  • f5 big-ip container ingress services · >= 17.1.0 <= 17.1.3; >= 17.5.0 <= 17.5.1 · NVD CPE · Source
  • f5 big-ip ddos hybrid defender · >= 17.1.0 <= 17.1.3; >= 17.5.0 <= 17.5.1 · NVD CPE · Source
  • f5 big-ip domain name system · >= 17.1.0 <= 17.1.3; >= 17.5.0 <= 17.5.1 · NVD CPE · Source
  • f5 big-ip edge gateway · >= 17.1.0 <= 17.1.3; >= 17.5.0 <= 17.5.1 · NVD CPE · Source
  • f5 big-ip fraud protection service · >= 17.1.0 <= 17.1.3; >= 17.5.0 <= 17.5.1 · NVD CPE · Source
  • f5 big-ip global traffic manager · >= 17.1.0 <= 17.1.3; >= 17.5.0 <= 17.5.1 · NVD CPE · Source
  • f5 big-ip link controller · >= 17.1.0 <= 17.1.3; >= 17.5.0 <= 17.5.1 · NVD CPE · Source
  • f5 big-ip local traffic manager · >= 17.1.0 <= 17.1.3; >= 17.5.0 <= 17.5.1 · NVD CPE · Source
  • f5 big-ip policy enforcement manager · >= 17.1.0 <= 17.1.3; >= 17.5.0 <= 17.5.1 · NVD CPE · Source
  • f5 big-ip ssl orchestrator · >= 17.1.0 <= 17.1.3; >= 17.5.0 <= 17.5.1 · NVD CPE · Source
  • f5 big-ip webaccelerator · >= 17.1.0 <= 17.1.3; >= 17.5.0 <= 17.5.1 · NVD CPE · Source
  • f5 big-ip websafe · version range not provided by source · NVD CPE · Source
Recorded patch / KBNot provided by source

Vendor or catalog guidance (source)

Not provided by source

Known exploitation (source facts)

Only what a source states. Unknown means no source has said either way; it is not "not exploited".

CISA KEV
Unknown
Exploited (source statement)
Unknown
Publicly disclosed (source)
Unknown

Suggested hunting (rule-based inference)

SecOps Signal recommendation (rule-based inference). These steps are hunting hypotheses from the vulnerability class; they do not state or imply that exploitation occurred here or anywhere.

No rule-based guidance for this vulnerability class

CISA KEV Record

CISA KEV status was not determined for this record.

Change History & Source Data

— No recorded material change

CNA / source
f5sirt@f5.com
Record status · verification
UPDATED · NVD API
CPE
cpe:2.3:a:f5:big-ip_access_policy_manager:*:*:*:*:*:*:*:*, cpe:2.3:a:f5:big-ip_advanced_firewall_manager:*:*:*:*:*:*:*:*, cpe:2.3:a:f5:big-ip_advanced_web_application_firewall:*:*:*:*:*:*:*:*, cpe:2.3:a:f5:big-ip_analytics:*:*:*:*:*:*:*:*, cpe:2.3:a:f5:big-ip_application_acceleration_manager:*:*:*:*:*:*:*:*, cpe:2.3:a:f5:big-ip_application_security_manager:*:*:*:*:*:*:*:*, cpe:2.3:a:f5:big-ip_application_visibility_and_reporting:*:*:*:*:*:*:*:*, cpe:2.3:a:f5:big-ip_automation_toolchain:*:*:*:*:*:*:*:*, cpe:2.3:a:f5:big-ip_carrier-grade_nat:*:*:*:*:*:*:*:*, cpe:2.3:a:f5:big-ip_container_ingress_services:*:*:*:*:*:*:*:*

Evidence & Provenance

2 public sources
my.f5.comSource recordnvd.nist.govSource record

Linked by the query's stored exact CVE association. Review required tables and validation status before use.

Detection Hunting Query
Target: DeviceTvmSoftwareVulnerabilities•Defender XDR
Detect endpoints exposed to CVE-2026-39459
Purpose: Exposure assessment (Category: Exposure Check)Why linked: Query metadata names CVE-2026-39459
DeviceTvmSoftwareVulnerabilities| where CveId == "CVE-2026-39459"| project DeviceId, DeviceName, OSPlatform, OSVersion, SoftwareVendor, SoftwareName, SoftwareVersion, CveId, VulnerabilitySeverityLevel, RecommendedSecurityUpdate, RecommendedSecurityUpdateId| sort by VulnerabilitySeverityLevel desc
Schema Checked · Not runtime validatedSource: SecOps Signal deterministic template · Limited verificationStatic screening: Passed structure and schema checks; tenant execution is not verified.
Open KQL Library

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Correlated briefings

SecOps Signal surfaces public advisory facts only. A missing value means the source has not published it, not that your environment is unaffected. No tenant inventory is connected.