Last Modified: Jan 21, 2026
Affected Product(s):
BIG-IP Install/Upgrade, TMOS
Known Affected Versions:
15.1.0, 15.1.0.1, 15.1.0.2, 15.1.0.3, 15.1.0.4, 15.1.0.5, 15.1.1, 15.1.2, 15.1.2.1, 15.1.3, 15.1.3.1, 15.1.4, 15.1.4.1, 15.1.5, 15.1.5.1, 15.1.6, 15.1.6.1, 15.1.7, 15.1.8, 15.1.8.1, 15.1.8.2, 15.1.9, 15.1.9.1, 15.1.10, 15.1.10.2, 15.1.10.3, 15.1.10.4, 15.1.10.5, 15.1.10.6, 15.1.10.7, 16.1.0, 16.1.1, 16.1.2, 16.1.2.1, 16.1.2.2, 16.1.3, 16.1.3.1, 16.1.3.2, 16.1.3.3, 16.1.3.4, 16.1.3.5, 16.1.4, 16.1.4.1, 16.1.4.2, 16.1.4.3, 16.1.5, 16.1.5.1, 16.1.5.2, 16.1.6, 17.1.0, 17.1.0.1, 17.1.0.2, 17.1.0.3, 17.1.1, 17.1.1.1, 17.1.1.2, 17.1.1.3, 17.1.1.4, 17.1.2, 17.1.2.1, 17.1.2.2, 17.5.0, 17.5.1
Fixed In:
21.0.0, 17.5.1.2, 17.1.3, 16.1.6.1, 15.1.10.8
Opened: Feb 24, 2025 Severity: 2-Critical
License activation fails with an error "Couldn't contact INTERNAL licensing server. Check your base registration key for correct formatting."
Unable to license via GUI in automatic licensing.
-- Click System :: License : Reactivate and select automatic method to reactivate.
Use TMSH license method. tmsh install sys license registration-key <key>
TMOS BIG-IP use Entrust CA in callhome updatecheck and GUI licensing(javacerts). In code base these using "ca-bundle.crt" and it is now replaced with new ca-file "f5-ca-bundle.crt" For gui licensing, tomcat uses new f5-ca-bundle-cacerts file which is generated from "f5-ca-bundle.crt"