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Vulnerability DatabaseCVE-2021-22975

CVE-2021-22975: 
F5 BIG-IP Advanced Firewall Manager vulnerability analysis and mitigation

Overview

The vulnerability (CVE-2021-22975) affects BIG-IP systems, specifically versions 16.0.x before 16.0.1.1, 15.1.x before 15.1.2.1, and 14.1.x before 14.1.3.1. The vulnerability was discovered and initially recorded on January 6, 2021. Under certain circumstances, the Traffic Management Microkernel (TMM) may restart on the BIG-IP system while processing large bursts of traffic (MITRE CVE).

Technical details

The vulnerability is related to the Traffic Management Microkernel (TMM) component of BIG-IP systems. The issue manifests when the system processes large bursts of traffic, which can trigger an unexpected restart of the TMM (MITRE CVE).

Impact

The primary impact of this vulnerability is a potential denial of service condition. When exploited, it can cause the Traffic Management Microkernel to restart, potentially disrupting network traffic processing and affecting system availability (CERT-FR).

Mitigation and workarounds

F5 has released patched versions to address this vulnerability. Users should upgrade to version 16.0.1.1, 15.1.2.1, or 14.1.3.1 depending on their current version track. Systems that have reached End of Software Development (EoSD) are not evaluated (MITRE CVE).

Additional resources

Source: This report was generated using AI

Related F5 BIG-IP Advanced Firewall Manager vulnerabilities:

CVE ID

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Technologies

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CISA KEV exploit

Has fix

Published date

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  • cpe:2.3:a:f5:big-ip_access_policy_manager
NoYesAug 13, 2025

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