What is CVE-2018-5517?

CVE-2018-5517 is a high-severity vulnerability in F5 Big-Ip Access Policy Manager, classified under Improper Input Validation. CVSS score: 7.5/10. Published 2018-05-02.

How severe is CVE-2018-5517?

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

Improper input validation in F5 Big-Ip Access Policy Manager

CVE-2018-5517

On F5 BIG-IP 13.1.0-13.1.0.5, malformed TCP packets sent to a self IP address or a FastL4 virtual server may cause an interruption of service. The control plane is not exposed to this issue. This issue impacts the data plane virtual servers and self IPs.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

Published 2018-05-02 · 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: 0.017 (76.5th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 76th percentile — 76.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.018 · newest: 0.017 · change: -0.001

Affected products

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

www.securitytracker.com/id/1040805 (VDB Entry, Third Party Advisory, vdb-entry)
support.f5.com/csp/article/K25573437 (Vendor Advisory)

Frequently asked questions

What is CVE-2018-5517?: CVE-2018-5517 is a high-severity vulnerability in F5 Big-Ip Access Policy Manager, classified under Improper Input Validation. CVSS score: 7.5/10. Published 2018-05-02.
How severe is CVE-2018-5517?: High severity. CVSS v3 base score is 7.5 out of 10.