On BIG-IP 15.0.0-15.0.1.1, 14.1.0-14.1.2.2, 14.0.0-14.0.1, 13.1.0-13.1.3.1, 12.1.0-12.1.5, and 11.6.0-11.6.5.1, the tmm crashes under certa…

published 2020-02-06 6 y ago modified 2026-06-17 4 mo ago also EUVD-2020-27008

cvss: 5.9; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 0.8%; EPSS 0.8% chance of exploitation in 30 days, percentile 57%
public exploits: 0; none known

On BIG-IP 15.0.0-15.0.1.1, 14.1.0-14.1.2.2, 14.0.0-14.0.1, 13.1.0-13.1.3.1, 12.1.0-12.1.5, and 11.6.0-11.6.5.1, the tmm crashes under certain circumstances when using the connector profile if a specific sequence of connections are made.

Patch / fix

fixed in 13

f5 big-ip_access_policy_manager 12.1.5.1, 13.1.3.2, 14.0.1.1, 14.1.2.1, 15.1.0
f5 big-ip_advanced_firewall_manager 12.1.5.1, 13.1.3.2, 14.0.1.1, 14.1.2.1, 15.1.0
f5 big-ip_analytics 12.1.5.1, 13.1.3.2, 14.0.1.1, 14.1.2.1, 15.1.0
f5 big-ip_application_acceleration_manager 12.1.5.1, 13.1.3.2, 14.0.1.1, 14.1.2.1, 15.1.0
f5 big-ip_application_security_manager 12.1.5.1, 13.1.3.2, 14.0.1.1, 14.1.2.1, 15.1.0
f5 big-ip_domain_name_system 12.1.5.1, 13.1.3.2, 14.0.1.1, 14.1.2.1, 15.1.0
f5 big-ip_edge_gateway 12.1.5.1, 13.1.3.2, 14.0.1.1, 14.1.2.1, 15.1.0
f5 big-ip_fraud_protection_service 12.1.5.1, 13.1.3.2, 14.0.1.1, 14.1.2.1, 15.1.0
f5 big-ip_global_traffic_manager 12.1.5.1, 13.1.3.2, 14.0.1.1, 14.1.2.1, 15.1.0
f5 big-ip_link_controller 12.1.5.1, 13.1.3.2, 14.0.1.1, 14.1.2.1, 15.1.0
f5 big-ip_local_traffic_manager 12.1.5.1, 13.1.3.2, 14.0.1.1, 14.1.2.1, 15.1.0
f5 big-ip_policy_enforcement_manager 12.1.5.1, 13.1.3.2, 14.0.1.1, 14.1.2.1, 15.1.0
f5 big-ip_webaccelerator 12.1.5.1, 13.1.3.2, 14.0.1.1, 14.1.2.1, 15.1.0

Exploit prediction

0.81% chance of exploitation in the next 30 days, higher than 57% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
NVD	3.1	5.9	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD	2.0	4.3	AV:N/AC:M/Au:N/C:N/I:N/A:P

Affected products

F5 BIG-IP

References

support.f5.com /csp/article/K50046200
vendor-advisory

Sources

CVE List CVE-2020-5854
NVD CVE-2020-5854

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