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Vulnerability DatabaseCVE-2025-59781

CVE-2025-59781: 
F5 BIG-IP Virtual Edition vulnerability analysis and mitigation

Overview

CVE-2025-59781 is a vulnerability discovered and disclosed on October 15, 2025, affecting BIG-IP and BIG-IP Next CNF virtual server systems. The vulnerability occurs when DNS cache is configured on these systems, where undisclosed DNS queries can trigger an increase in memory resource utilization (NVD).

Technical details

The vulnerability has received a CVSS v4.0 Base Score of 8.7 (HIGH) with the vector string CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L, and a CVSS v3.1 Base Score of 7.5 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H. The vulnerability is classified under CWE-459 (Incomplete Cleanup) (NVD).

Impact

The primary impact of this vulnerability is on system availability through increased memory resource utilization when DNS cache is configured. This can potentially affect the performance and stability of affected BIG-IP and BIG-IP Next CNF virtual servers (NVD).

Mitigation and workarounds

The vulnerability affects multiple versions of BIG-IP products including versions 15.1.0 to 15.1.10.8, 16.1.0 to 16.1.6, and 17.1.0 to 17.1.2.2, as well as BIG-IP Next Cloud-Native Network Functions versions 1.1.0 to 1.4.0. Users should refer to F5's official advisory for specific mitigation instructions (F5 Advisory).

Additional resources

Source: This report was generated using AI

Related F5 BIG-IP Virtual Edition vulnerabilities:

CVE ID

Severity

Score

Technologies

Component name

CISA KEV exploit

Has fix

Published date

CVE-2025-61990HIGH8.7
  • F5 BIG-IP Virtual EditionF5 BIG-IP Virtual Edition
  • cpe:2.3:a:f5:big-ip_application_security_manager
NoYesOct 15, 2025
CVE-2025-58071HIGH8.7
  • F5 BIG-IP Virtual EditionF5 BIG-IP Virtual Edition
  • cpe:2.3:a:f5:big-ip_domain_name_system
NoYesOct 15, 2025
CVE-2025-61974HIGH8.7
  • F5 BIG-IP Virtual EditionF5 BIG-IP Virtual Edition
  • cpe:2.3:a:f5:big-ip_access_policy_manager
NoYesOct 15, 2025
CVE-2025-61951HIGH8.7
  • F5 BIG-IP Virtual EditionF5 BIG-IP Virtual Edition
  • cpe:2.3:a:f5:big-ip_application_security_manager
NoYesOct 15, 2025
CVE-2025-61958HIGH8.5
  • F5 BIG-IP Virtual EditionF5 BIG-IP Virtual Edition
  • cpe:2.3:a:f5:big-ip_access_policy_manager
NoYesOct 15, 2025

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