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Fencer Intel
medium 5.9

CVE-2020-5854 json

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 6y ago modified 4mo 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

Summary

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

  • 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

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Exploit prediction

0.81% chance of exploitation in the next 30 days, higher than 57% of all scored CVEs (FIRST EPSS, 2026-11-09).

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

Sources

Fencer Intel 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.