CVE-2024-21771

Name: CVE-2024-21771
Creator: NVD / NIST
Published: 2024-02-14T17:15:11.827+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 0.52%

Last modified Jun 17, 2026

CVE-2024-21771 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. For unspecified traffic patterns, BIG-IP AFM IPS engine may spend an excessive amount of time matching the traffic against signatures, resulting in Traffic Management Microkernel (TMM) restarting and traffic disruption. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated. EPSS estimates a 0.52% chance of exploitation in the next 30 days.

Description

For unspecified traffic patterns, BIG-IP AFM IPS engine may spend an excessive amount of time matching the traffic against signatures, resulting in Traffic Management Microkernel (TMM) restarting and traffic disruption. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

0.52%

39.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
F5	Big-Ip Advanced Firewall Manager	>= 15.1.0, < 15.1.9
F5	Big-Ip Advanced Firewall Manager	>= 16.1.0, < 16.1.4
F5	Big-Ip Advanced Firewall Manager	17.1.0

References

https://my.f5.com/manage/s/article/K000137595Vendor Advisory
https://my.f5.com/manage/s/article/K000137595Vendor Advisory

Timeline

Published: Feb 14, 2024
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2024-21771?

How severe is CVE-2024-21771?

CVE-2024-21771 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.52% probability of exploitation in the next 30 days.

How do I fix CVE-2024-21771?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2024-21771?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST