What’s Vulnerable › Vulnerabilities
CVE-2019-6686
- Severity: medium (CVSS 5.3 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 1.0% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2019-12-23 · updated 2026-06-17
Description
On BIG-IP versions 15.0.0-15.0.1.1, 14.1.0-14.1.2, 14.0.0-14.0.1, 13.1.0-13.1.3.1, the Traffic Management Microkernel (TMM) might stop responding after the total number of diameter connections and pending messages on a single virtual server has reached 32K.
Affected products
- F5 BIG-IP (LTM): from 13.1.0 before 13.1.3.2; from 14.0.0 before 14.0.1.1; from 14.1.0 before 14.1.2.1; from 15.0.0 before 15.1.0 — fixed in 13.1.3.2, 14.0.1.1, 14.1.2.1, 15.1.0
How to fix
Upgrade to a fixed version: F5 BIG-IP (LTM) 13.1.3.2, 14.0.1.1, 14.1.2.1, 15.1.0. Check the vendor advisory for mitigations.
References
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