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CVE-2026-39458

F5 Big-Ip Access Policy Manager

When a BIG-IP is configured with DNS caching (Such as a DNS profile with caching enabled, SSL Orchestrator, Advanced WAF DoS protection), undisclosed traffic can cause the Traffic Management Microkernel (TMM) to terminate. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

Exploitation status

  • A vendor advisory or patch reference has been published.

What the metrics mean

  • It is reachable over a network, without needing local access.
  • For an attacker who can reach it, no special conditions are needed to exploit it.
  • To exploit it, no account is needed.
  • Beyond that, no action by a user is required.

Scoring

CVSS
7.5 (v3.1)
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4
8.7
Weakness
CWE-824
Assigned by
f5sirt@f5.com

Dates

Published
2026-05-13
Last modified
2026-08-24
Sources
NVD

Affected products

  • F5 Big-Ip Access Policy Manager17.1.0 - 17.1.3, 17.5.0 - 17.5.1, 16.1.0 - 16.1.6, 21.0.0
  • F5 Big-Ip Advanced Firewall Manager17.1.0 - 17.1.3, 17.5.0 - 17.5.1, 16.1.0 - 16.1.6, 21.0.0
  • F5 Big-Ip Advanced Web Application Firewall17.1.0 - 17.1.3, 17.5.0 - 17.5.1, 16.1.0 - 16.1.6, 21.0.0
  • F5 Big-Ip Analytics17.1.0 - 17.1.3, 17.5.0 - 17.5.1, 16.1.0 - 16.1.6, 21.0.0
  • F5 Big-Ip Application Acceleration Manager17.1.0 - 17.1.3, 17.5.0 - 17.5.1, 16.1.0 - 16.1.6, 21.0.0
  • F5 Big-Ip Application Security Manager17.1.0 - 17.1.3, 17.5.0 - 17.5.1, 16.1.0 - 16.1.6, 21.0.0
  • F5 Big-Ip Application Visibility And Reporting17.1.0 - 17.1.3, 17.5.0 - 17.5.1, 16.1.0 - 16.1.6, 21.0.0
  • F5 Big-Ip Automation Toolchain17.1.0 - 17.1.3, 17.5.0 - 17.5.1, 16.1.0 - 16.1.6, 21.0.0
  • F5 Big-Ip Carrier-Grade Nat17.1.0 - 17.1.3, 17.5.0 - 17.5.1, 16.1.0 - 16.1.6, 21.0.0
  • F5 Big-Ip Container Ingress Services17.1.0 - 17.1.3, 17.5.0 - 17.5.1, 16.1.0 - 16.1.6, 21.0.0
  • F5 Big-Ip Ddos Hybrid Defender17.1.0 - 17.1.3, 17.5.0 - 17.5.1, 16.1.0 - 16.1.6, 21.0.0
  • F5 Big-Ip Domain Name System17.1.0 - 17.1.3, 17.5.0 - 17.5.1, 16.1.0 - 16.1.6, 21.0.0

As listed in the NVD configuration data. Not a statement about your estate.

References