What’s Vulnerable › Vulnerabilities

CVE-2021-22985

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.0% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-02-12 · updated 2026-06-17
• Weakness: CWE-400

Description

On BIG-IP APM version 16.0.x before 16.0.1.1, under certain conditions, when processing VPN traffic with APM, TMM consumes excessive memory. A malicious, authenticated VPN user may abuse this to perform a DoS attack against the APM. Note: Software versions which have reached End of Software Development (EoSD) are not evaluated.

Affected products

• BIG-IP ASM: from 11.6.1 before 11.6.5.2; from 12.1.0 before 12.1.5.3; from 13.1.0 before 13.1.3.6; from 14.1.0 before 14.1.2.8; from 15.1.0 before 15.1.2; from 16.0.0 before 16.0.1.1 — fixed in 11.6.5.2, 12.1.5.3, 13.1.3.6, 14.1.2.8, 15.1.2, 16.0.1.1

How to fix

Upgrade to a fixed version: BIG-IP ASM 11.6.5.2, 12.1.5.3, 13.1.3.6, 14.1.2.8. Check the vendor advisory for mitigations.

References

• https://support.f5.com/csp/article/K88162221
• https://support.f5.com/csp/article/K88162221

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