F5 BIG-IP iRule HTTP::respond Causes Memory Leak
CVE-2025-46706 Published on October 15, 2025
BIG-IP iRules vulnerability
When an iRule containing the HTTP::respond command 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.
Vulnerability Analysis
CVE-2025-46706 is exploitable with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity, and a high impact on availability.
Weakness Type
Allocation of Resources Without Limits or Throttling
The software allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated, in violation of the intended security policy for that actor.
Products Associated with CVE-2025-46706
stack.watch emails you whenever new vulnerabilities are published in F5 Networks Big Ip or F5 Networks . Just hit a watch button to start following.
Affected Versions
F5 BIG-IP:- Version 17.5.0 and below * is unaffected.
- Version 17.1.0 and below 17.1.2.2 is affected.
- Version 16.1.0 and below 16.1.6 is affected.
- Version 15.1.0 and below * is unaffected.
- Version 2.0.0 and below * is unaffected.
- Version 1.7.0 and below * is affected.
- Version 2.0.0 and below * is unaffected.
- Version 1.1.0 and below * is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.