Last Modified: Jan 16, 2026
Affected Product(s):
BIG-IP LTM
Known Affected Versions:
17.1.3
Opened: Dec 30, 2025 Severity: 3-Major
SSL handshakes fail on the client due to an Illegal Parameter alert.
SSL handshake fails and the connection terminates
ClientSSL that mixes both FFDHE and Non-FFDHE groups and has session tickets enabled. The client tries to resume an SSL session with a Non-FFDHE key share that used FFDHE previously.
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