CVE-2026-41218

published 2026-05-13

CVE-2026-41218: When BIG-IP PEM iRules are configured on a virtual server (iRules using commands starting with CLASSIFICATION::, CLASSIFY::, PEM::, PSC::, and the urlcatquery…

high 8.7 CVSS 4.0

AV N AC L AT N PR N UI N VC N VI N VA H SC N SI N SA N E X CR X IR X AR X MAV X MAC X MAT X MPR X MUI X MVC X MVI X MVA X MSC X MSI X MSA X S X AU X R X V X RE X U X

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.

Affected

5 ranges

Vendor	Product	Version range	Fixed in
f5	big-ip	>= 16.1.0 < *	*
f5	big-ip	>= 17.1.0 < 17.1.3.1	17.1.3.1
f5	big-ip	>= 17.5.0 < 17.5.1.4	17.5.1.4
f5	big-ip	>= 21.0.0 < 21.0.0.1	21.0.0.1
f5	big-ip_pem	—	—

CWE-416