CVE-2026-40435 MEDIUM

CVE-2026-40435: BIG-IP httpd access control vulnerability

Vendor F5
Product BIG-IP
Weakness CWE-420
Published May 13, 2026
Last update May 13, 2026
View on NVD All CVEs

CVSS base score

5.3/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality Low
Integrity None

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

What the vulnerability does

01Description

When configured, IP-based access restrictions for httpd do not cover all endpoints, which may allow connections from blocked addresses.  Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

Key dates

02Disclosure timeline

May 13, 2026 CVE published
May 13, 2026 Record updated