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Fencer Vulns
high 7.5

CVE-2021-23013 json

On BIG-IP versions 16.0.x before 16.0.1.1, 15.1.x before 15.1.3, 14.1.x before 14.1.4, 13.1.x before 13.1.3.6, and 12.1.x before 12.1.5.3,…

published 2021-05-10 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-10131

cvss
7.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.9%
EPSS 0.9% chance of exploitation in 30 days, percentile 58%
public exploits
0
none known

Summary

On BIG-IP versions 16.0.x before 16.0.1.1, 15.1.x before 15.1.3, 14.1.x before 14.1.4, 13.1.x before 13.1.3.6, and 12.1.x before 12.1.5.3, the Traffic Management Microkernel (TMM) may stop responding when processing Stream Control Transmission Protocol (SCTP) traffic under certain conditions. This vulnerability affects TMM by way of a virtual server configured with an SCTP profile. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

Patch / fix

  • f5 big-ip_access_policy_manager 12.1.5.3, 13.1.4, 14.1.4, 15.1.3, 16.0.1.1
  • f5 big-ip_advanced_firewall_manager 12.1.5.3, 13.1.4, 14.1.4, 15.1.3, 16.0.1.1
  • f5 big-ip_advanced_web_application_firewall 12.1.5.3, 13.1.4, 14.1.4, 15.1.3, 16.0.1.1
  • f5 big-ip_analytics 12.1.5.3, 13.1.4, 14.1.4, 15.1.3, 16.0.1.1
  • f5 big-ip_application_acceleration_manager 12.1.5.3, 13.1.4, 14.1.4, 15.1.3, 16.0.1.1
  • f5 big-ip_application_security_manager 12.1.5.3, 13.1.4, 14.1.4, 15.1.3, 16.0.1.1
  • f5 big-ip_ddos_hybrid_defender 12.1.5.3, 13.1.4, 14.1.4, 15.1.3, 16.0.1.1
  • f5 big-ip_domain_name_system 12.1.5.3, 13.1.4, 14.1.4, 15.1.3, 16.0.1.1
  • f5 big-ip_fraud_protection_service 12.1.5.3, 13.1.4, 14.1.4, 15.1.3, 16.0.1.1
  • f5 big-ip_global_traffic_manager 12.1.5.3, 13.1.4, 14.1.4, 15.1.3, 16.0.1.1
  • f5 big-ip_link_controller 12.1.5.3, 13.1.4, 14.1.4, 15.1.3, 16.0.1.1
  • f5 big-ip_local_traffic_manager 12.1.5.3, 13.1.4, 14.1.4, 15.1.3, 16.0.1.1
  • f5 big-ip_policy_enforcement_manager 12.1.5.3, 13.1.4, 14.1.4, 15.1.3, 16.0.1.1
  • f5 big-ip_ssl_orchestrator 12.1.5.3, 13.1.4, 14.1.4, 15.1.3, 16.0.1.1

Exploit prediction

0.86% chance of exploitation in the next 30 days, higher than 58% 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 5.4 AV:N/AC:H/Au:N/C:N/I:N/A:C

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.