CVE-2026-41227

Name: CVE-2026-41227
Creator: NVD / NIST
Published: 2026-05-13T16:16:44.92+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.7/10EPSS 0.26%

Last modified Jun 24, 2026

CVE-2026-41227 is a high-severity vulnerability rated 8.7/10 on the CVSS scale. On an HTTP/2 virtual server with Layer 7 DoS Protection configured, undisclosed traffic can result in an increase in memory consumption causing the Traffic Management Microkernel (TMM) process to terminate. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.. EPSS estimates a 0.26% chance of exploitation in the next 30 days.

Description

On an HTTP/2 virtual server with Layer 7 DoS Protection configured, undisclosed traffic can result in an increase in memory consumption causing the Traffic Management Microkernel (TMM) process to terminate. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

Metrics

CVSS 3.1

7.5/10

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

CVSS 4.0

8.7/10

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

EPSS Probability

0.26%

17.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-770

Affected Software

Vendor	Product	Versions
F5	Big-Ip Advanced Web Application Firewall	>= 17.1.0, <= 17.1.3
F5	Big-Ip Advanced Web Application Firewall	>= 17.5.0, <= 17.5.1
F5	Big-Ip Application Security Manager	>= 17.1.0, <= 17.1.3
F5	Big-Ip Application Security Manager	>= 17.5.0, <= 17.5.1
F5	Big-Ip Ddos Hybrid Defender	>= 17.1.0, <= 17.1.3
F5	Big-Ip Ddos Hybrid Defender	>= 17.5.0, <= 17.5.1
F5	Big-Ip Advanced Web Application Firewall	>= 16.1.0, <= 16.1.6
F5	Big-Ip Application Security Manager	>= 16.1.0, <= 16.1.6
F5	Big-Ip Ddos Hybrid Defender	>= 16.1.0, <= 16.1.6

References

https://my.f5.com/manage/s/article/K000158979Vendor Advisory

Timeline

Published: May 13, 2026
Last Modified: Jun 24, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-41227?

How severe is CVE-2026-41227?

CVE-2026-41227 has a CVSS score of 8.7/10 (HIGH severity). The EPSS model estimates a 0.26% probability of exploitation in the next 30 days.

How do I fix CVE-2026-41227?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-41227?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST