Memory Resource Utilization Issue in BIG-IP by F5 Networks
CVE-2025-59781

8.7HIGH

Key Information:

Vendor

F5
Status
Big-ip
Big-ip Next Cnf
Vendor
CVE Published:
15 October 2025

What is CVE-2025-59781?

A configuration issue in the BIG-IP and BIG-IP Next CNF virtual servers when using DNS cache may lead to increased memory resource utilization due to undisclosed DNS queries. This can potentially affect system performance if not addressed. Users should review their configurations and ensure they are running supported versions.

Affected Version(s)

BIG-IP 17.1.0 < 17.1.2.2

BIG-IP 16.1.0 < 16.1.6

BIG-IP 15.1.0 < 15.1.10.8

References

https://my.f5.com/manage/s/article/K000150637
vendor-advisory

CVSS V4

Score:
8.7
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

F5
JSON
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CVE-2025-59781 : Memory Resource Utilization Issue in BIG-IP by F5 Networks