On BIG-IP 15.1.x before 15.1.3, 14.1.x before 14.1.4.2, 13.1.0.8 through 13.1.3.6, and all versions of 16.0.x, when running in Appliance Mo…

published 2021-05-10 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-10133

cvss: 7.2; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 1.3%; EPSS 1.3% chance of exploitation in 30 days, percentile 71%
public exploits: 0; none known

On BIG-IP 15.1.x before 15.1.3, 14.1.x before 14.1.4.2, 13.1.0.8 through 13.1.3.6, and all versions of 16.0.x, when running in Appliance Mode, an authenticated user assigned the 'Administrator' role may be able to bypass Appliance Mode restrictions utilizing undisclosed iControl REST endpoints. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

Patch / fix

fixed in 14

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

Exploit prediction

1.34% chance of exploitation in the next 30 days, higher than 71% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
NVD	3.1	7.2	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
NVD	2.0	6.5	AV:N/AC:L/Au:S/C:P/I:P/A:P

Affected products

n/a BIG-IP

Classification

Weakness

CWE-863 Incorrect Authorization

References

support.f5.com /csp/article/K74151369
vendor-advisory

Sources

CVE List CVE-2021-23015
NVD CVE-2021-23015

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