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MEDIUM · 5.3

CVE-2026-34019

When Bidirectional Forwarding Detection (BFD) is configured in Static and Dynamic routing protocols, undisclosed traffic can cause the Traffic Management Microkernel (TMM) to stop processing BFD packe...

Vulnerability Description

When Bidirectional Forwarding Detection (BFD) is configured in Static and Dynamic routing protocols, undisclosed traffic can cause the Traffic Management Microkernel (TMM) to stop processing BFD packets and cause the configured routing protocol to fail over.  Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

CVSS Score

5.3

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
LOW

Affected Products

VendorProductVersions
F5Big-Ip Access Policy Manager>= 17.1.0, <= 17.1.2
F5Big-Ip Advanced Firewall Manager>= 17.1.0, <= 17.1.2
F5Big-Ip Advanced Web Application Firewall>= 17.1.0, <= 17.1.2
F5Big-Ip Analytics>= 17.1.0, <= 17.1.2
F5Big-Ip Application Acceleration Manager>= 17.1.0, <= 17.1.2
F5Big-Ip Application Security Manager>= 17.1.0, <= 17.1.2
F5Big-Ip Application Visibility And Reporting>= 17.1.0, <= 17.1.2
F5Big-Ip Automation Toolchain>= 17.1.0, <= 17.1.2
F5Big-Ip Carrier-Grade Nat>= 17.1.0, <= 17.1.2
F5Big-Ip Container Ingress Services>= 17.1.0, <= 17.1.2
F5Big-Ip Ddos Hybrid Defender>= 17.1.0, <= 17.1.2
F5Big-Ip Domain Name System>= 17.1.0, <= 17.1.2
F5Big-Ip Edge Gateway>= 17.1.0, <= 17.1.2
F5Big-Ip Fraud Protection Service>= 17.1.0, <= 17.1.2
F5Big-Ip Global Traffic Manager>= 17.1.0, <= 17.1.2
F5Big-Ip Link Controller>= 17.1.0, <= 17.1.2
F5Big-Ip Local Traffic Manager>= 17.1.0, <= 17.1.2
F5Big-Ip Policy Enforcement Manager>= 17.1.0, <= 17.1.2
F5Big-Ip Ssl Orchestrator>= 17.1.0, <= 17.1.2
F5Big-Ip Webaccelerator>= 17.1.0, <= 17.1.2

Related Weaknesses (CWE)

CWE-410

References

FAQ

What is CVE-2026-34019?

CVE-2026-34019 is a vulnerability with a CVSS score of 5.3 (MEDIUM). When Bidirectional Forwarding Detection (BFD) is configured in Static and Dynamic routing protocols, undisclosed traffic can cause the Traffic Management Microkernel (TMM) to stop processing BFD packe...

How severe is CVE-2026-34019?

CVE-2026-34019 has been rated MEDIUM with a CVSS base score of 5.3/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-34019?

Check the references section above for vendor advisories and patch information. 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.