CVE-2026-41218
HighCVSS 7.5Exploitation Probability (EPSS)
Low risk17th percentile - higher than 17% of all known CVEs
Summary
A vulnerability in BIG-IP PEM iRules may cause the Traffic Management Microkernel (TMM) to terminate due to undisclosed traffic. This affects iRules using specific commands.
Risk Assessment
The termination of TMM may lead to service availability interruptions, impacting the organization's operational continuity.
Recommendation
It is recommended to monitor iRules configurations and update the software to versions that have not reached End of Technical Support.
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Original NVD description (English source)
When BIG-IP PEM iRules are configured on a virtual server (iRules using commands starting with CLASSIFICATION::, CLASSIFY::, PEM::, PSC::, and the urlcatquery command), undisclosed traffic can cause the Traffic Management Microkernel (TMM) to terminate. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.