CVE-2026-39459
HighCVSS 7.2Exploitation Probability (EPSS)
Low risk17th percentile - higher than 17% of all known CVEs
Summary
A vulnerability in iControl REST and TMOS Shell (tmsh) allows an authenticated attacker with at least the Manager role to create configuration objects that enable arbitrary command execution.
Risk Assessment
The risk involves potential full system compromise by a privileged attacker, leading to loss of confidentiality, integrity, and availability of data.
Recommendation
It is recommended to immediately apply security patches provided by the vendor and restrict access to iControl REST and tmsh interfaces to trusted administrators only.
Other vulnerabilities in F5 BIG-IP
See all- CVE-2016-9250High
In F5 BIG-IP versions 11.2.1, 11.4.0 through 11.6.1, and 12.0.0 through 12.1.2, an unauthenticated user with access to the control plane may be able to delete arbitrary files through an undisclosed mechanism.
- CVE-2016-9256High
In F5 BIG-IP versions 12.1.0 through 12.1.2, a race condition can occur that may delay the enforcement of permissions by iControl. If the role_map is not reloaded after permissions are changed, a user may gain access to resources they should not have access to.
- CVE-2016-9253High
In F5 BIG-IP versions 12.1.0 through 12.1.2, specific websocket traffic patterns may cause a disruption of service for virtual servers configured to use the websocket profile.
- CVE-2016-9251High
In F5 BIG-IP versions 12.0.0 through 12.1.2, an authenticated attacker may gain elevated privileges through a crafted iControl REST connection.
- CVE-2016-9252High
The Traffic Management Microkernel (TMM) in F5 BIG-IP before 11.5.4 HF3, 11.6.x before 11.6.1 HF2 and 12.x before 12.1.2 does not properly handle minimum path MTU options for IPv6, allowing remote attackers to cause a denial-of-service (DoS) through unspecified vectors.
- CVE-2016-5020High
F5 BIG-IP versions before 12.0.0 HF3 allow remote authenticated users to modify the account configuration of users with the Resource Administration role, potentially gaining privileges via a crafted external Extended Application Verification (EAV) monitor script.
- CVE-2016-4545High
Virtual servers in F5 BIG-IP 11.5.4, when SSL profiles are enabled, allow remote attackers to cause a denial of service through resource consumption and Traffic Management Microkernel restart via an SSL alert during the handshake.
- CVE-1999-1550Medium
The bigconf.conf file in F5 BIG/ip version 2.1.2 and earlier allows remote attackers to read arbitrary files by specifying the target file in the 'file' parameter.
- CVE-2026-40629High
A vulnerability in SSL profiles on a virtual server can cause it to stop processing new client connections due to undisclosed traffic. The issue affects software versions that have not reached End of Technical Support.
- CVE-2026-40462Medium
Incorrect permission assignment vulnerabilities exist in iControl REST and TMOS shell (tmsh) undisclosed command, allowing an authenticated attacker to view sensitive information.
Original NVD description (English source)
A vulnerability exists in iControl REST and the TMOS Shell (tmsh) where a highly privileged, authenticated attacker with at least the Manager role can create configuration objects that allow running arbitrary commands. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.