Description
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.
References (1)
Core 1
Core References
Vendor Advisory vendor-advisory
patch
https://my.f5.com/manage/s/article/K000160875
Scores
CVSS v3
7.5
EPSS
0.0010
EPSS Percentile
26.8%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-416
Status
published
Products (5)
F5/BIG-IP
16.1.0
F5/BIG-IP
17.1.0 - 17.1.3.1
F5/BIG-IP
17.5.0 - 17.5.1.4
F5/BIG-IP
21.0.0 - 21.0.0.1
F5/BIG-IP
21.1.0
Published
May 13, 2026
Tracked Since
May 13, 2026