Description
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.
Published: 2026-05-13
Score: 8.7 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

Vendor Workaround

CHANGE_ME

Tracking

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Advisories

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History

Mon, 24 Aug 2026 21:45:00 +0000

Type Values Removed Values Added
Description When a BIG-IP DNS profile enabled with DNS cache is configured on a virtual server, 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. 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.

Wed, 13 May 2026 17:00:00 +0000

Type Values Removed Values Added
First Time appeared F5
F5 big-ip
Vendors & Products F5
F5 big-ip

Wed, 13 May 2026 16:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Wed, 13 May 2026 15:15:00 +0000

Type Values Removed Values Added
Description When a BIG-IP DNS profile enabled with DNS cache is configured on a virtual server, 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.
Title BIG-IP DNS Cache vulnerability
Weaknesses CWE-824
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

cvssV4_0

{'score': 8.7, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N'}

Subscriptions

F5 Big-ip Big-ip Access Policy Manager Big-ip Advanced Firewall Manager Big-ip Advanced Web Application Firewall Big-ip Analytics Big-ip Application Acceleration Manager Big-ip Application Security Manager Big-ip Application Visibility And Reporting Big-ip Automation Toolchain Big-ip Carrier-grade Nat Big-ip Container Ingress Services Big-ip Ddos Hybrid Defender Big-ip Domain Name System Big-ip Edge Gateway Big-ip Fraud Protection Service Big-ip Global Traffic Manager Big-ip Link Controller Big-ip Local Traffic Manager Big-ip Policy Enforcement Manager Big-ip Ssl Orchestrator Big-ip Webaccelerator Big-ip Websafe
cve-icon MITRE

Status: PUBLISHED

Assigner: f5

Published:

Updated: 2026-08-24T21:39:14.540Z

Reserved: 2026-04-30T23:04:27.924Z

Link: CVE-2026-39458

cve-icon Vulnrichment

Updated: 2026-05-13T16:08:26.210Z

cve-icon NVD

Status : Modified

Published: 2026-05-13T16:16:41.223

Modified: 2026-08-24T22:16:52.500

Link: CVE-2026-39458

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-25T00:15:04Z

Weaknesses
  • CWE-824

    Access of Uninitialized Pointer