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CVE-2026-41218

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CVE-2026-41218

Published: May 13, 2026

Modified: May 13, 2026

PUBLISHED

CVSS v3.1

7.5

HIGH

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.

VendorProductVersions

F5

BIG-IP

unaffected
21.1.0 - < *
affected
21.0.0 - < 21.0.0.1
affected
17.5.0 - < 17.5.1.4
affected
17.1.0 - < 17.1.3.1
affected
16.1.0 - < *

Weaknesses (CWE)

CWE-416

CVSS v3.1 Details

CVSS v3.1 Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

References

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