CVE-2026-41227BIG-IP HTTP/2 Layer 7 Dos Protection vulnerability
Updated under an hour ago ()
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It affects F5 BIG-IP and 3 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- CWE-770
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- f5
- NVD analysis
- Analyzed
- Record last updated
- May 13, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
F5 BIG-IP f5:big_ip (from the name) | from 21.0.0 not affected; from 17.5.0 before 17.5.1.4; from 17.1.0 before 17.1.3.1; from 16.1.0 | CNA record |
f5 big-ip_advanced_web_application_firewall f5:big-ip_advanced_web_application_firewall | from 17.1.0 through 17.1.3; from 17.5.0 through 17.5.1; from 16.1.0 through 16.1.6 | NVD |
f5 big-ip_application_security_manager f5:big-ip_application_security_manager | from 17.1.0 through 17.1.3; from 17.5.0 through 17.5.1; from 16.1.0 through 16.1.6 | NVD |
f5 big-ip_ddos_hybrid_defender f5:big-ip_ddos_hybrid_defender | from 17.1.0 through 17.1.3; from 17.5.0 through 17.5.1; from 16.1.0 through 16.1.6 | NVD |
References
- https://my.f5.com/manage/s/article/K000158979vendor-advisory, patch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.