vulntracker.iovulntracker.io
© 2026 vulntracker.io

CVE-2026-41227

BIG-IP HTTP/2 Layer 7 Dos Protection vulnerability

HIGH
7.5
CVSS Score
Published: May 13, 2026 at 02:12 PM UTC
Updated: October 26, 2026 at 05:10 PM UTC
4 products affected across 1 vendorBig IP Application Security ManagerBig IP Advanced Web Application FirewallBig IP Ddos Hybrid Defender

Using BIG-IP by F5?

Get instant alerts when new vulnerabilities affect BIG-IP - before attackers find them.

Real-time alertsTrack your software stackFree plan available
Start FreeSign In
Severity
HIGH7.5
Exploit prediction
EPSS 0.3%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Big IP Advanced Web Application Firewall· F5
95%
16.1.0 ≤ v ≤ 16.1.617.1.0 ≤ v ≤ 17.1.317.5.0 ≤ v ≤ 17.5.1
Big IP Application Security Manager· F5
95%
16.1.0 ≤ v ≤ 16.1.617.1.0 ≤ v ≤ 17.1.317.5.0 ≤ v ≤ 17.5.1
Big IP Ddos Hybrid Defender· F5
95%
16.1.0 ≤ v ≤ 16.1.617.1.0 ≤ v ≤ 17.1.317.5.0 ≤ v ≤ 17.5.1
BIG-IP· F5
90%
16.1.0 ≤ v < *17.1.0 ≤ v < 17.1.3.117.5.0 ≤ v < 17.5.1.416.1.017.1.017.5.0
Affected range stops below 17.1.3.1, so it looks safe — our inference, not a vendor statement
Affected range stops below 17.5.1.4, so it looks safe — our inference, not a vendor statement
Vendor states this is fixed in 21.0.0 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

Vendor AdvisoryPatch
Source: cverecord
https://my.f5.com/manage/s/article/K000158979

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.5HIGHf5
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-770

Get alerted

Stop reading CVE feeds looking for your own stack

Track the products you run and VulnTracker tells you when a new CVE affects them — with what is known about fixing it, and nothing about the rest.

Create accountSign in
Free plan, no card