Medium severity · published May 13, 2026
CVE-2026-34019
BIG-IP BFD vulnerability
5.3
CVSS
0.3%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 22% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
BI
BIG-IP · F5
17.5.0 before 17.5.1; 17.1.0 before 17.1.3; 16.1.0 · source: vendor
BA
Big-ip Access Policy Manager · F5
17.1.0 through 17.1.2; 17.5.0; 16.1.0 through 16.1.6 · source: NVD
BA
Big-ip Advanced Firewall Manager · F5
17.1.0 through 17.1.2; 17.5.0; 16.1.0 through 16.1.6 · source: NVD
BA
Big-ip Advanced Web Application Firewall · F5
17.1.0 through 17.1.2; 17.5.0; 16.1.0 through 16.1.6 · source: NVD
BA
Big-ip Analytics · F5
17.1.0 through 17.1.2; 17.5.0; 16.1.0 through 16.1.6 · source: NVD
BA
Big-ip Application Acceleration Manager · F5
17.1.0 through 17.1.2; 17.5.0; 16.1.0 through 16.1.6 · source: NVD
BA
Big-ip Application Security Manager · F5
17.1.0 through 17.1.2; 17.5.0; 16.1.0 through 16.1.6 · source: NVD
BA
Big-ip Application Visibility And Reporting · F5
17.1.0 through 17.1.2; 17.5.0; 16.1.0 through 16.1.6 · source: NVD
BA
Big-ip Automation Toolchain · F5
17.1.0 through 17.1.2; 17.5.0; 16.1.0 through 16.1.6 · source: NVD
BC
Big-ip Carrier-grade Nat · F5
17.1.0 through 17.1.2; 17.5.0; 16.1.0 through 16.1.6 · source: NVD
BC
Big-ip Container Ingress Services · F5
17.1.0 through 17.1.2; 17.5.0; 16.1.0 through 16.1.6 · source: NVD
BD
Big-ip Ddos Hybrid Defender · F5
17.1.0 through 17.1.2; 17.5.0; 16.1.0 through 16.1.6 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-34019
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-34019
Vendor Advisory
https://my.f5.com/manage/s/article/K000150508
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