On BIG-IP version 16.x before 16.1.0, 15.1.x before 15.1.3.1, 14.1.x before 14.1.4.2, 13.1.x before 13.1.4.1, and all versions of 12.1.x an…

published 2021-09-14 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-10162

cvss: 7.5; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 0.9%; EPSS 0.9% chance of exploitation in 30 days, percentile 60%
public exploits: 0; none known

On BIG-IP version 16.x before 16.1.0, 15.1.x before 15.1.3.1, 14.1.x before 14.1.4.2, 13.1.x before 13.1.4.1, and all versions of 12.1.x and 11.6.x, when the Intel QuickAssist Technology (QAT) compression driver is used on affected BIG-IP hardware and BIG-IP Virtual Edition (VE) platforms, 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.

Patch / fix

fixed in 11

f5 big-ip_access_policy_manager 13.1.4.1, 14.1.4.2, 15.1.3.1, 16.1.0
f5 big-ip_advanced_firewall_manager 14.1.4.2, 15.1.3.1, 16.1.0
f5 big-ip_analytics 13.1.4.1, 14.1.4.2, 15.1.3.1, 16.1.0
f5 big-ip_application_acceleration_manager 13.1.4.1, 14.1.4.2, 15.1.3.1, 16.1.0
f5 big-ip_application_security_manager 13.1.4.1, 14.1.4.2, 15.1.3.1, 16.1.0
f5 big-ip_domain_name_system 13.1.4.1, 14.1.4.2, 15.1.3.1, 16.1.0
f5 big-ip_fraud_protection_service 13.1.4.1, 14.1.4.2, 15.1.3.1, 16.1.0
f5 big-ip_global_traffic_manager 13.1.4.1, 14.1.4.2, 15.1.3.1, 16.1.0
f5 big-ip_link_controller 13.1.4.1, 14.1.4.2, 15.1.3.1, 16.1.0
f5 big-ip_local_traffic_manager 13.1.4.1, 14.1.4.2, 15.1.3.1, 16.1.0
f5 big-ip_policy_enforcement_manager 13.1.4.1, 14.1.4.2, 15.1.3.1, 16.1.0

Exploit prediction

0.93% chance of exploitation in the next 30 days, higher than 60% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
NVD	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD	2.0	4.3	AV:N/AC:M/Au:N/C:N/I:N/A:P

Affected products

n/a BIG-IP

Classification

Weakness

CWE-20 Improper Input Validation

References

support.f5.com /csp/article/K35408374
vendor-advisory

Sources

CVE List CVE-2021-23044
NVD CVE-2021-23044

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary