Home / Vulnerabilities / CVE-2021-22991
CRITICAL SEVERITY
CVE-2021-22991 F5 · BIG-IP Traffic Management Microkernel

F5 BIG-IP Traffic Management Microkernel Buffer Overflow

Technical Severity

CVSS v3.1 Metrics

CRITICAL
9.8 / 10
Minimal Risk Critical
Vector Specification
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Exploitation Likelihood

EPSS Prediction

66.26 %
Predictive Probability
Percentile Rank
98.5 th

Documented as more likely to be exploited than 98.5% of known CVEs.

Detection Date

Jan 18, 2022

Remediation Due

Feb 01, 2022

CISA Catalog Active

Threat Analysis

The Traffic Management Microkernel of BIG-IP ASM Risk Engine has a buffer overflow vulnerability, leading to a bypassing of URL-based access controls.

Remediation Directive

Apply updates per vendor instructions.

External Intelligence