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CVE-2018-5540

17
FAUCET Score

CVE-2018-5540 describes a privilege management vulnerability in the big3d process across several F5 products, including BIG-IP, Enterprise Manager, BIG-IQ, and iWorkflow versions. The flaw stems from the process failing to properly minimize group privileges at startup. Rated Medium with a CVSS v3.0 score of 4.4, this vulnerability requires high privileges for exploitation and could lead to a high impact on confidentiality, but no impact on integrity or availability. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
>= 11.5.1, <= 11.5.6CPE matchmatch criteria
cpe:2.3:a:f5:big-ip_domain_name_system:*:*:*:*:*:*:*:*
>= 11.6.0, <= 11.6.3.1CPE matchmatch criteria
cpe:2.3:a:f5:big-ip_domain_name_system:*:*:*:*:*:*:*:*
>= 12.1.0, <= 12.1.3.3CPE matchmatch criteria
cpe:2.3:a:f5:big-ip_domain_name_system:*:*:*:*:*:*:*:*
>= 13.0.0, <= 13.0.1CPE matchmatch criteria
cpe:2.3:a:f5:big-ip_domain_name_system:*:*:*:*:*:*:*:*
>= 11.5.1, <= 11.5.6CPE matchmatch criteria
cpe:2.3:a:f5:big-ip_global_traffic_manager:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

4.4MEDIUM

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

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
0.8
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
0.41%
Probability of exploitation in next 30 days
EPSS Percentile
33.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0041 is in the 83rd percentile among its peer group of 3,720 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

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