Cross-site request forgery in BIG-IP - CVE-2026-40703
Published: May 14, 2026
Vulnerability identifier: #VU131413
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-40703
CWE-ID: CWE-352
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: F5 Networks
Affected software:
BIG-IP
BIG-IP
Detailed vulnerability description
The vulnerability allows a remote attacker to perform unauthorized create, modify, and delete actions on the dashboard.
The vulnerability exists due to cross-site request forgery in the configuration utility dashboard when handling crafted requests from an authenticated user's browser. A remote attacker can cause an authenticated user to send a crafted request to perform unauthorized create, modify, and delete actions on the dashboard.
This is a control plane issue; there is no data plane exposure.
How to mitigate CVE-2026-40703
Install security update from vendor's website.