What is CVE-2026-34019?

CVE-2026-34019 is a medium-severity vulnerability in F5 Big-ip, classified under CWE-410. CVSS score: 5.3/10. Published 2026-05-13.

How severe is CVE-2026-34019?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Vulnerability in F5 Big-ip

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 packets and cause the configured routing pro…

EPSS: 0.001 (26.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.

Affected products

F5 Big-ip — versions 21.0.0, 17.5.0, 17.1.0

Weakness classification (CWE)

CWE-410

References

f5sirt@f5.com (vendor-advisory, patch)

Frequently asked questions

What is CVE-2026-34019?: CVE-2026-34019 is a medium-severity vulnerability in F5 Big-ip, classified under CWE-410. CVSS score: 5.3/10. Published 2026-05-13.
How severe is CVE-2026-34019?: Medium severity. CVSS v3 base score is 5.3 out of 10.