CVE-2021-23009

HighCVSS 7.5/10Last modified Jun 17, 2026

Description

On BIG-IP version 16.0.x before 16.0.1.1 and 15.1.x before 15.1.3, malformed HTTP/2 requests may cause an infinite loop which causes a Denial of Service for Data Plane traffic. TMM takes the configured HA action when the TMM process is aborted. There is no control plane exposure, this is a data plane issue only. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-835

Affected software

VendorProductVersions
n/aBIG-IP16.0.x before 16.0.1.1 and 15.1.x before 15.1.3

References

Timeline

Published
May 10, 2021
Last modified
Jun 17, 2026
NVD status
Modified

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CVE-2021-23009: High severity, CVSS 7.5 | Vulnix