What is CVE-2018-5536?

CVE-2018-5536 is a high-severity vulnerability in F5 Big-Ip Access Policy Manager, classified under Missing Release of Resource after Effective Lifetime. CVSS score: 7.5/10. Published 2018-07-25.

How severe is CVE-2018-5536?

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

Vulnerability in F5 Big-Ip Access Policy Manager

CVE-2018-5536

A remote attacker via undisclosed measures, may be able to exploit an F5 BIG-IP APM 13.0.0-13.1.0.7 or 12.1.0-12.1.3.5 virtual server configured with an APM per-request policy object and cause a memory leak in the APM module.

Published 2018-07-25 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.023 (82.8th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 83rd percentile — 82.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.024 · newest: 0.023 · change: -0.000

Affected products

F5 Big-Ip Access Policy Manager — versions 14.0.0
F5 Networks, Inc. Big-Ip (Apm) — versions 13.0.0-13.1.0.7, 12.1.0-12.1.3.5

Weakness classification (CWE)

CWE-772 — Missing Release of Resource after Effective Lifetime

References

www.securityfocus.com/bid/104922 (VDB Entry, Third Party Advisory, vdb-entry)
support.f5.com/csp/article/K27391542 (Vendor Advisory)

Frequently asked questions

What is CVE-2018-5536?: CVE-2018-5536 is a high-severity vulnerability in F5 Big-Ip Access Policy Manager, classified under Missing Release of Resource after Effective Lifetime. CVSS score: 7.5/10. Published 2018-07-25.
How severe is CVE-2018-5536?: High severity. CVSS v3 base score is 7.5 out of 10.