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Fencer Vulns
high 7.5

CVE-2020-5949 json

On BIG-IP versions 14.0.0-14.0.1 and 13.1.0-13.1.3.4, certain traffic pattern sent to a virtual server configured with an FTP profile can c…

published 2020-12-11 5 y ago modified 2026-06-17 4 mo ago also EUVD-2020-27103

cvss
7.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.0%
EPSS 1.0% chance of exploitation in 30 days, percentile 64%
public exploits
0
none known

Summary

On BIG-IP versions 14.0.0-14.0.1 and 13.1.0-13.1.3.4, certain traffic pattern sent to a virtual server configured with an FTP profile can cause the FTP channel to break.

Patch / fix

  • f5 big-ip_access_policy_manager 13.1.3.5, 14.1.0
  • f5 big-ip_advanced_firewall_manager 13.1.3.5, 14.1.0
  • f5 big-ip_advanced_web_application_firewall 13.1.3.5, 14.1.0
  • f5 big-ip_analytics 13.1.3.5, 14.1.0
  • f5 big-ip_application_acceleration_manager 13.1.3.5, 14.1.0
  • f5 big-ip_application_security_manager 13.1.3.5, 14.1.0
  • f5 big-ip_ddos_hybrid_defender 13.1.3.5, 14.1.0
  • f5 big-ip_domain_name_system 13.1.3.5, 14.1.0
  • f5 big-ip_fraud_protection_service 13.1.3.5, 14.1.0
  • f5 big-ip_global_traffic_manager 13.1.3.5, 14.1.0
  • f5 big-ip_link_controller 13.1.3.5, 14.1.0
  • f5 big-ip_local_traffic_manager 13.1.3.5, 14.1.0
  • f5 big-ip_policy_enforcement_manager 13.1.3.5, 14.1.0
  • f5 big-ip_ssl_orchestrator 13.1.3.5, 14.1.0

Exploit prediction

1.04% chance of exploitation in the next 30 days, higher than 64% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 7.5 CVSS:3.1/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

  • n/a BIG-IP

References

Sources

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.