High severity · published Oct 15, 2025
CVE-2025-61974
BIG-IP SSL/TLS vulnerability
7.5
CVSS
0.5%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 40% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
BI
BIG-IP · F5
17.5.0 before 17.5.1.3; 17.1.0 before 17.1.3; 16.1.0 before 16.1.6.1; 15.1.0 before 15.1.10.8 · source: vendor
BN
BIG-IP Next CNF · F5
2.0.0; 1.1.0 · source: vendor
BN
BIG-IP Next SPK · F5
2.0.0; 1.9.0; 1.8.0; 1.7.0 · source: vendor
BN
BIG-IP Next for Kubernetes · F5
2.0.0 · source: vendor, NVD
BN
Big-ip Next Cloud-native Network Functions · F5
1.1.0 through 1.4.1; 2.0.0 through 2.1.0 · source: NVD
BN
Big-ip Next Service Proxy For Kubernetes · F5
1.7.0 through 1.9.2; 2.0.0 through 2.0.2 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-61974
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-61974
Vendor Advisory
https://my.f5.com/manage/s/article/K000156733
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