CVE-2024-21771: high-severity vulnerability in F5 BIG-IP
F5 AFM Signature Matching Vulnerability
Published · Updated
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.5epss 0.5%
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
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products
F5 · BIG-IPRelated CVEs — F5 BIG-IP
In the same product, most dangerous first.
CVE-2022-1388CRITICALCVE-2022-1388EPSS 100.0%KEVCVE-2023-46747CRITICALBIG-IP Configuration utility unauthenticated remote code execution vulnerabilityEPSS 96.7%KEVCVE-2026-94127CRITICALBIG-IP APM OAuth vulnerabilityEPSS 26.6%KEVCVE-2023-46748HIGHBIG-IP Configuration utility authenticated SQL injection vulnerabilityEPSS 4.3%KEVCVE-2025-53521CRITICALBigIP APM VulnerabilityEPSS 2.3%KEVCVE-2022-41622HIGHiControl SOAP vulnerabilityEPSS 92.4%