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Vulnerability record · CVE-2018-5540 · published 19 July 2018

CVE-2018-5540: F5 big-ip domain name system incorrect permission assignment vulnerability

F5 · Big Ip Domain Name System

On F5 BIG-IP 13.0.0-13.0.1, 12.1.0-12.1.3.3, 11.6.0-11.6.3.1, or 11.5.1-11.5.6, Enterprise Manager 3.1.1, BIG-IQ Centralized Management 5.0.0-5.1.0, BIG-IQ Cloud and Orchestration 1.0.0, or F5 iWorkflow 2.1.0-2.3.0 the big3d process does not irrevocably minimize group privileges at start up.

4.4 CVSS 3.0 Medium EPSS 0.41% · top 67.2% CWE-732 · Incorrect permission assignment
4.4CVSS 3.0 base score, v2 2.1
0.41%EPSS exploitation probability, 30 days
NoNot in CISA KEV
6Affected product versions listed by NVD
8References
17 Jun 2026Last modified by NVD

Description

On F5 BIG-IP 13.0.0-13.0.1, 12.1.0-12.1.3.3, 11.6.0-11.6.3.1, or 11.5.1-11.5.6, Enterprise Manager 3.1.1, BIG-IQ Centralized Management 5.0.0-5.1.0, BIG-IQ Cloud and Orchestration 1.0.0, or F5 iWorkflow 2.1.0-2.3.0 the big3d process does not irrevocably minimize group privileges at start up.

CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N

Affected products

6 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://www.securityfocus.com/bid/104920 Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1041340 Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1041341 Third Party AdvisoryVDB Entry
https://support.f5.com/csp/article/K82038789 Vendor Advisory
http://www.securityfocus.com/bid/104920 Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1041340 Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1041341 Third Party AdvisoryVDB Entry
https://support.f5.com/csp/article/K82038789 Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2018-5540), CISA KEV, FIRST EPSS (scores of 2026-09-29). This page is refreshed as NVD updates the record.