Last Modified: Dec 11, 2025
Affected Product(s):
BIG-IP LTM
Known Affected Versions:
17.1.2.2, 17.1.3, 17.5.0, 17.5.1, 17.5.1.2, 17.5.1.3
Fixed In:
21.0.0
Opened: Oct 16, 2025 Severity: 2-Critical
Connections fail through virtual servers as the server's initial data is dropped.
Connections fail.
- DB key tm.tcpstopblindinjection is enabled - Virtual server for protocol where server speaks first (e.g. SMTP, SSH/SFTP, FTP)
Disable the DB key sys db tm.tcpstopblindinjection
Improved handling of sys db tm.tcpstopblindinjection