BIG-IP
CVE-2025-61974: BIG-IP SSL/TLS vulnerability
When a client SSL profile is configured on a virtual server, undisclosed requests can cause an increase in memory resource utilization.
Published
ExploitedNot in CISA KEV
Ransomware useNot reportedPer CISA
SeverityHIGHCVSS 4.0 8.7
EPSS0.46%Chance of exploitation in 30 days
Public exploitNot tracked
FixAvailable
Automatic summary from the vendor's CVE record. We haven't written a full analysis of this vulnerability yet.
Affected and fixed versions
| Product / branch | Fixed in |
|---|---|
| BIG-IP 17.5 | 17.5.1.3 or later |
| BIG-IP 17.1 | 17.1.3 or later |
| BIG-IP 16.1 | 16.1.6.1 or later |
| BIG-IP 15.1 | 15.1.10.8 or later |
| BIG-IP Next SPK 2.0 | 2.0.0-EHF-2, 2.0.2-EHF-2, 2.1.0-EHF-1 or later |
| BIG-IP Next SPK 1.9 | * or later |
| BIG-IP Next SPK 1.8 | * or later |
| BIG-IP Next SPK 1.7 | 1.7.14-EHF-2 or later |
| BIG-IP Next CNF 2.0 | 2.0.0-EHF-2, 2.0.2-EHF-2, 2.1.0-EHF-1 or later |
| BIG-IP Next CNF 1.1 | 1.4.0-EHF-3 or later |
| BIG-IP Next for Kubernetes 2.0 | 2.1.0-EHF-1 or later |
Always confirm against the vendor advisory, which lists every fixed hotfix.
What it is
When a client SSL profile is configured on a virtual server, undisclosed requests can cause an increase in memory resource utilization. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
Sources
KEV status, EPSS score and vendor data refreshed automatically, last on 12 Oct 2026.