CVE Tools
Sign in

CVE-2026-41218

BIG-IP PEM iRules vulnerability

Published: May 13, 2026Updated: Jun 24, 2026 Sources: CVE List NVDCWE-416
7.5HIGH
NVD MITRE
EPSS Score
0.3%
Top 82.5%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Workaround Only

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:NI:NA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:HAvailability
High
Open in CVSS calculator →

Weaknesses

CWE-416

Affected Products

BIG-IPF5
On-premNetwork Device
Networking Infrastructure / router-switch
big-ip access policy managerf5
On-premNetwork Device
Networking Infrastructure / firewall
big-ip advanced firewall managerf5
On-premSecurity Product
Networking Infrastructure / firewall
big-ip advanced web application firewallf5
On-premSecurity Product
Networking Infrastructure / firewall
big-ip analyticsf5
On-premNetwork Device
Networking Infrastructure / network-management
f5commercialUSNetworking Infrastructure
and 17 more affected products View all →

Exploitability

Workaround Available
No detection template yetWe can run the check for you — a free external exposure review, no install. Check my exposure

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

MITRE ATT&CK

2 techniques
Initial Access
Privilege Escalation
View detailed technique mapping

References

https://my.f5.com/manage/s/article/K000160875
my.f5.com

Timeline

Published
May 13, 2026
Last Updated
Jun 24, 2026

Unlock Complete Vulnerability Intelligence

Get the full picture for CVE-2026-41218 and every CVE in our database. Create a free account — no credit card required.

Create Free Account
Plain-language analysis
Impact assessment and exploitation scenario in plain English
Attack graph visualization
Interactive attack path and kill chain mapping
Exploit details & PoC links
ExploitDB, Metasploit, GitHub PoCs with direct links
Nuclei scanner templates
Ready-to-use vulnerability scanner templates
Full remediation guide
Patch instructions, workarounds, and compliance impact
Interactive AI chat
Ask questions about this vulnerability in natural language
Related vulnerabilities
Semantically similar CVEs and attack patterns
REST API & MCP access
Integrate vulnerability data into your workflows