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MEDIUM · 6.5

CVE-2026-42781

When embedded Packet Velocity Acceleration (ePVA) acceleration is configured, undisclosed local ethernet traffic can cause an increase in ePVA and Traffic Management Microkernel (TMM) resource utiliza...

Vulnerability Description

When embedded Packet Velocity Acceleration (ePVA) acceleration is configured, undisclosed local ethernet traffic can cause an increase in ePVA and Traffic Management Microkernel (TMM) resource utilization.  Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

CVSS Score

6.5

MEDIUM

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector
ADJACENT_NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH

Affected Products

VendorProductVersions
F5Big-Ip Access Policy Manager21.0.0
F5Big-Ip Advanced Firewall Manager21.0.0
F5Big-Ip Advanced Web Application Firewall21.0.0
F5Big-Ip Analytics21.0.0
F5Big-Ip Application Acceleration Manager21.0.0
F5Big-Ip Application Security Manager21.0.0
F5Big-Ip Application Visibility And Reporting21.0.0
F5Big-Ip Automation Toolchain21.0.0
F5Big-Ip Carrier-Grade Nat21.0.0
F5Big-Ip Container Ingress Services21.0.0
F5Big-Ip Ddos Hybrid Defender21.0.0
F5Big-Ip Domain Name System21.0.0
F5Big-Ip Edge Gateway21.0.0
F5Big-Ip Fraud Protection Service21.0.0
F5Big-Ip Global Traffic Manager21.0.0
F5Big-Ip Link Controller21.0.0
F5Big-Ip Local Traffic Manager21.0.0
F5Big-Ip Policy Enforcement Manager21.0.0
F5Big-Ip Ssl Orchestrator21.0.0
F5Big-Ip Webaccelerator21.0.0

Related Weaknesses (CWE)

CWE-835

References

FAQ

What is CVE-2026-42781?

CVE-2026-42781 is a vulnerability with a CVSS score of 6.5 (MEDIUM). When embedded Packet Velocity Acceleration (ePVA) acceleration is configured, undisclosed local ethernet traffic can cause an increase in ePVA and Traffic Management Microkernel (TMM) resource utiliza...

How severe is CVE-2026-42781?

CVE-2026-42781 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-42781?

Check the references section above for vendor advisories and patch information. Affected products include: F5 Big-Ip Access Policy Manager, F5 Big-Ip Advanced Firewall Manager, F5 Big-Ip Advanced Web Application Firewall, F5 Big-Ip Analytics, F5 Big-Ip Application Acceleration Manager.