SOC status:Duty analyst on shift

UK Cyber Defence
VulnerabilityModified

CVE-2018-5516

On F5 BIG-IP 13.0.0-13.1.0.5, 12.1.0-12.1.2, or 11.2.1-11.6.3.1, Enterprise Manager 3.1.1, BIG-IQ Centralized Management 5.0.0-5.4.0 or 4.6.0, BIG-IQ Cloud and Orchestration 1.0.0, or F5 iWorkflow 2.0.2-2.3.0, authenticated users granted TMOS Shell…

MEDIUM 4.7EPSS 0.31%

Does this matter?

Lower severity and a low EPSS score (0.31%). Track it; it rarely justifies an emergency change on its own.

Description

On F5 BIG-IP 13.0.0-13.1.0.5, 12.1.0-12.1.2, or 11.2.1-11.6.3.1, Enterprise Manager 3.1.1, BIG-IQ Centralized Management 5.0.0-5.4.0 or 4.6.0, BIG-IQ Cloud and Orchestration 1.0.0, or F5 iWorkflow 2.0.2-2.3.0, authenticated users granted TMOS Shell (tmsh) access can access objects on the file system which would normally be disallowed by tmsh restrictions. This allows for authenticated, low privileged attackers to exfiltrate objects on the file system which should not be allowed.

CVSS 3.0
4.7 MEDIUMCVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
EPSS
0.31% probability · 24th percentile
Public exploits
None in Exploit-DB
CISA KEV
Not listed
Weakness
CWE-732
Affected
f5/big-ip local traffic manager · f5/big-ip application acceleration manager · f5/big-ip advanced firewall manager · f5/big-ip analytics · f5/big-ip access policy manager · f5/big-ip application security manager · f5/big-ip edge gateway · f5/big-ip global traffic manager · f5/big-ip link controller · f5/big-ip policy enforcement manager · f5/big-ip webaccelerator · f5/big-ip websafe · f5/big-ip domain name system · f5/big-ip enterprise manager · f5/big-iq centralized management · f5/big-iq cloud and orchestration · f5/f5 iworkflow
Source
f5sirt@f5.com
EPSS trend
0%3%5%27 October 2026: 0.31%27 October 202627 October 2026

EPSS 0.3% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.

Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.