CVE-2020-5891

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2020-04-30 · updated 2026-06-17

Description

On BIG-IP 15.1.0-15.1.0.1, 15.0.0-15.0.1.2, and 14.1.0-14.1.2.3, undisclosed HTTP/2 requests can lead to a denial of service when sent to a virtual server configured with the Fallback Host setting and a server-side HTTP/2 profile.

Affected products

F5 BIG-IP APM: from 14.1.0 through 14.1.2.3; from 15.0.0 through 15.0.1.2; from 15.1.0 through 15.1.0.1
BIG-IP: from 14.1.0 through 14.1.2.3; from 15.0.0 through 15.0.1.2; from 15.1.0 through 15.1.0.1
F5 Big-Ip Analytics: from 14.1.0 through 14.1.2.3; from 15.0.0 through 15.0.1.2; from 15.1.0 through 15.1.0.1
F5 Networks, Inc. BIG-IP (AAM): from 14.1.0 through 14.1.2.3; from 15.0.0 through 15.0.1.2; from 15.1.0 through 15.1.0.1
BIG-IP ASM: from 14.1.0 through 14.1.2.3; from 15.0.0 through 15.0.1.2; from 15.1.0 through 15.1.0.1
F5 Big-Ip Fraud Protection Service: from 14.1.0 through 14.1.2.3; from 15.0.0 through 15.0.1.2; from 15.1.0 through 15.1.0.1
F5 Big-Ip Link Controller: from 14.1.0 through 14.1.2.3; from 15.0.0 through 15.0.1.2; from 15.1.0 through 15.1.0.1
F5 BIG-IP (LTM): from 14.1.0 through 14.1.2.3; from 15.0.0 through 15.0.1.2; from 15.1.0 through 15.1.0.1
F5 Networks, Inc. BIG-IP (PEM): from 14.1.0 through 14.1.2.3; from 15.0.0 through 15.0.1.2; from 15.1.0 through 15.1.0.1

References

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