What’s Vulnerable › Vulnerabilities

CVE-2021-23035

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-09-14 · updated 2026-06-17
• Weakness: CWE-20

Description

On BIG-IP 14.1.x before 14.1.4.4, when an HTTP profile is configured on a virtual server, after a specific sequence of packets, chunked responses can cause the Traffic Management Microkernel (TMM) to terminate. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

Affected products

• F5 BIG-IP APM: from 14.1.0 through 14.1.4.4
• BIG-IP: from 14.1.0 through 14.1.4.4
• F5 Big-Ip Analytics: from 14.1.0 through 14.1.4.4
• F5 Networks, Inc. BIG-IP (AAM): from 14.1.0 through 14.1.4.4
• BIG-IP ASM: from 14.1.0 through 14.1.4.4
• F5 BIG-IP DNS: from 14.1.0 through 14.1.4.4
• F5 Big-Ip Fraud Protection Service: from 14.1.0 through 14.1.4.4
• F5 Big-Ip Global Traffic Manager: from 14.1.0 through 14.1.4.4
• F5 Big-Ip Link Controller: from 14.1.0 through 14.1.4.4
• F5 BIG-IP (LTM): from 14.1.0 through 14.1.4.4
• F5 Networks, Inc. BIG-IP (PEM): from 14.1.0 through 14.1.4.4

References

• https://support.f5.com/csp/article/K70415522
• https://support.f5.com/csp/article/K70415522

Get alerted when CVE-2021-23035 or the next vulnerability affects your stack