What is CVE-2022-27189?

CVE-2022-27189 is a high-severity vulnerability in F5 Big-Ip, classified under Incorrect Conversion between Numeric Types. CVSS score: 7.5/10. Published 2022-05-05.

How severe is CVE-2022-27189?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in F5 Big-Ip

CVE-2022-27189

On F5 BIG-IP 16.1.x versions prior to 16.1.2.2, 15.1.x versions prior to 15.1.5.1, 14.1.x versions prior to 14.1.4.6, 13.1.x versions prior to 13.1.5, and all versions of 12.1.x and 11.6.x, when an Internet Content Adaptation Protocol (ICAP) profile is configured on a virtual server, undisclosed traffic can cause an increase in Traffic Management Microkernel (TMM) memory resource utilization. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated

Published 2022-05-05 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.009 (59.1th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 59th percentile — 59.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: +0.000

Affected products

F5 Big-Ip — versions 12.1.x, 11.6.x, 17.0.0
F5 Big-Ip Access Policy Manager — versions 11.6.1, 11.6.2, 11.6.3
F5 Big-Ip Advanced Firewall Manager — versions 11.6.1, 11.6.2, 11.6.3
F5 Big-Ip Analytics — versions 11.6.1, 11.6.2, 11.6.3
F5 Big-Ip Application Acceleration Manager — versions 11.6.1, 11.6.2, 11.6.3
F5 Big-Ip Application Security Manager — versions 11.6.1, 11.6.2, 11.6.3
F5 Big-Ip Domain Name System — versions 11.6.1, 11.6.2, 11.6.3
F5 Big-Ip Fraud Protection Service — versions 11.6.1, 11.6.2, 11.6.3
F5 Big-Ip Global Traffic Manager — versions 11.6.1, 11.6.2, 11.6.3
F5 Big-Ip Link Controller — versions 11.6.1, 11.6.2, 11.6.3

Weakness classification (CWE)

CWE-681 — Incorrect Conversion between Numeric Types

References

support.f5.com/csp/article/K16187341 (Vendor Advisory)

Frequently asked questions

What is CVE-2022-27189?: CVE-2022-27189 is a high-severity vulnerability in F5 Big-Ip, classified under Incorrect Conversion between Numeric Types. CVSS score: 7.5/10. Published 2022-05-05.
How severe is CVE-2022-27189?: High severity. CVSS v3 base score is 7.5 out of 10.