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CVE-2026-42406

F5 Big-ip Access Policy Manager vulnerability

8.7 HIGHEPSS 0.25%
  1. Published13 May 2026

Description

A vulnerability exists in BIG-IP and BIG-IQ systems where a highly privileged, authenticated attacker with at least the Certificate Manager role can modify configuration objects that allow running arbitrary commands.     Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredHigh
User interactionNone
ScopeChanged
ConfidentialityHigh
IntegrityHigh
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N

Affected products

F5 Big-ip Access Policy Manager≥ 16.1.0 ≤ 16.1.6 · ≥ 17.1.0 ≤ 17.1.3 · ≥ 17.5.0 ≤ 17.5.1 · 21.0.0
F5 Big-ip Advanced Firewall Manager≥ 16.1.0 ≤ 16.1.6 · ≥ 17.1.0 ≤ 17.1.3 · ≥ 17.5.0 ≤ 17.5.1 · 21.0.0
F5 Big-ip Advanced Web Application Firewall≥ 16.1.0 ≤ 16.1.6 · ≥ 17.1.0 ≤ 17.1.3 · ≥ 17.5.0 ≤ 17.5.1 · 21.0.0
F5 Big-ip Analytics≥ 16.1.0 ≤ 16.1.6 · ≥ 17.1.0 ≤ 17.1.3 · ≥ 17.5.0 ≤ 17.5.1 · 21.0.0
F5 Big-ip Application Acceleration Manager≥ 16.1.0 ≤ 16.1.6 · ≥ 17.1.0 ≤ 17.1.3 · ≥ 17.5.0 ≤ 17.5.1 · 21.0.0
F5 Big-ip Application Security Manager≥ 16.1.0 ≤ 16.1.6 · ≥ 17.1.0 ≤ 17.1.3 · ≥ 17.5.0 ≤ 17.5.1 · 21.0.0
F5 Big-ip Application Visibility And Reporting≥ 16.1.0 ≤ 16.1.6 · ≥ 17.1.0 ≤ 17.1.3 · ≥ 17.5.0 ≤ 17.5.1 · 21.0.0
F5 Big-ip Automation Toolchain≥ 16.1.0 ≤ 16.1.6 · ≥ 17.1.0 ≤ 17.1.3 · ≥ 17.5.0 ≤ 17.5.1 · 21.0.0
F5 Big-ip Carrier-grade Nat≥ 16.1.0 ≤ 16.1.6 · ≥ 17.1.0 ≤ 17.1.3 · ≥ 17.5.0 ≤ 17.5.1 · 21.0.0
F5 Big-ip Container Ingress Services≥ 16.1.0 ≤ 16.1.6 · ≥ 17.1.0 ≤ 17.1.3 · ≥ 17.5.0 ≤ 17.5.1 · 21.0.0
F5 Big-ip Ddos Hybrid Defender≥ 16.1.0 ≤ 16.1.6 · ≥ 17.1.0 ≤ 17.1.3 · ≥ 17.5.0 ≤ 17.5.1 · 21.0.0
F5 Big-ip Domain Name System≥ 16.1.0 ≤ 16.1.6 · ≥ 17.1.0 ≤ 17.1.3 · ≥ 17.5.0 ≤ 17.5.1 · 21.0.0
F5 Big-ip Edge Gateway≥ 16.1.0 ≤ 16.1.6 · ≥ 17.1.0 ≤ 17.1.3 · ≥ 17.5.0 ≤ 17.5.1 · 21.0.0
F5 Big-ip Fraud Protection Service≥ 16.1.0 ≤ 16.1.6 · ≥ 17.1.0 ≤ 17.1.3 · ≥ 17.5.0 ≤ 17.5.1 · 21.0.0
F5 Big-ip Global Traffic Manager≥ 16.1.0 ≤ 16.1.6 · ≥ 17.1.0 ≤ 17.1.3 · ≥ 17.5.0 ≤ 17.5.1 · 21.0.0
F5 Big-ip Link Controller≥ 16.1.0 ≤ 16.1.6 · ≥ 17.1.0 ≤ 17.1.3 · ≥ 17.5.0 ≤ 17.5.1 · 21.0.0
F5 Big-ip Local Traffic Manager≥ 16.1.0 ≤ 16.1.6 · ≥ 17.1.0 ≤ 17.1.3 · ≥ 17.5.0 ≤ 17.5.1 · 21.0.0
F5 Big-ip Policy Enforcement Manager≥ 16.1.0 ≤ 16.1.6 · ≥ 17.1.0 ≤ 17.1.3 · ≥ 17.5.0 ≤ 17.5.1 · 21.0.0
F5 Big-ip SSL Orchestrator≥ 16.1.0 ≤ 16.1.6 · ≥ 17.1.0 ≤ 17.1.3 · ≥ 17.5.0 ≤ 17.5.1 · 21.0.0
F5 Big-ip Webaccelerator≥ 16.1.0 ≤ 16.1.6 · ≥ 17.1.0 ≤ 17.1.3 · ≥ 17.5.0 ≤ 17.5.1 · 21.0.0
F5 Big-ip Websafe≥ 16.1.0 ≤ 16.1.6 · ≥ 17.1.0 ≤ 17.1.3 · ≥ 17.5.0 ≤ 17.5.1 · 21.0.0
F5 Big-iq Centralized Management≥ 8.4.0 ≤ 8.4.1

Remediation

No fixed version is recorded in the NVD data. Check the vendor advisory for the latest guidance.

References

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Frequently asked

Is CVE-2026-42406 being actively exploited?

CVE-2026-42406 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.25%.

How severe is CVE-2026-42406?

CVE-2026-42406 has a CVSS 3.1 base score of 8.7, rated high. EPSS estimates a 0.25% probability of exploitation.

Which products are affected by CVE-2026-42406?

Affected products include F5 Big-ip Access Policy Manager, F5 Big-ip Advanced Firewall Manager, F5 Big-ip Advanced Web Application Firewall, F5 Big-ip Analytics, F5 Big-ip Application Acceleration Manager, and 17 more.

How do I fix CVE-2026-42406?

Apply the vendor's patch or advisory guidance, then verify no affected versions remain across your devices.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-42406 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.