On BIG-IP 11.5.1-11.5.8, 11.6.1-11.6.3, and 12.0.x, an undisclosed sequence of packets received by an SSL virtual server and processed by a…

published 2019-03-28 7 y ago modified 2026-06-17 4 mo ago also EUVD-2019-16164

cvss: 7.5; version 3.0, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 1.7%; EPSS 1.7% chance of exploitation in 30 days, percentile 77%
public exploits: 0; none known

On BIG-IP 11.5.1-11.5.8, 11.6.1-11.6.3, and 12.0.x, an undisclosed sequence of packets received by an SSL virtual server and processed by an associated Client SSL or Server SSL profile may cause a denial of service.

Patch / fix

fixed in 13

f5 big-ip_access_policy_manager 11.5.9, 11.6.4, 12.1.0
f5 big-ip_advanced_firewall_manager 11.5.9, 11.6.4, 12.1.0
f5 big-ip_application_acceleration_manager 11.5.9, 11.6.4, 12.1.0
f5 big-ip_edge_gateway 11.5.9, 11.6.4, 12.1.0
f5 big-ip_fraud_protection_service 11.5.9, 11.6.4, 12.1.0
f5 big-ip_global_traffic_manager 11.5.9, 11.6.4, 12.1.0
f5 big-ip_link_controller 11.5.9, 11.6.4, 12.1.0
f5 big-ip_local_traffic_manager 11.5.9, 11.6.4, 12.1.0
f5 big-ip_policy_enforcement_manager 11.5.9, 11.6.4, 12.1.0
f5 big-ip_webaccelerator 11.5.9, 11.6.4, 12.1.0
f5 big-ip_analytics 11.5.9, 11.6.4, 12.1.0
f5 big-ip_application_security_manager 11.5.9, 11.6.4, 12.1.0
f5 big-ip_protocol_security_manager 11.5.9, 11.6.4, 12.1.0

Exploit prediction

1.71% chance of exploitation in the next 30 days, higher than 77% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
NVD	3.0	7.5	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD	2.0	5.0	AV:N/AC:L/Au:N/C:N/I:N/A:P

Affected products

BIG-IP BIG-IP (LTM, AAM, AFM, Analytics, APM, ASM, DNS, Edge Gateway, FPS, GTM, Link Controller, PEM, WebAccelerator)

References

support.f5.com /csp/article/K45353544
vendor-advisory
securityfocus.com /bid/107629
vdb-entry, third-party-advisory

Sources

CVE List CVE-2019-6605
NVD CVE-2019-6605

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary