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    CVE-2026-39455

    When the BIG-IP Configuration utility is configured to use Lightweight Directory Access Protocol (LDAP) authentication, undisclosed traffic can cause the httpd process to exhaust the available file descriptors.  Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

    Published:May 13, 2026
    Last Modified:May 13, 2026
    EPS:May 13, 2026
    EPSS Score:
    CVSS Score:7.5

    Affected Products

    Vendor
    F5
    Product
    Big-ip

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-469 HTTP DoS

    Related CVEs

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    CVE-2026-59762 (CVSS 8.7) — When an HTTP/2 profile is configured on a virtual server, undisclosed requests can cause an increase in memory…
    CVE-2026-40423 (CVSS 8.7) — When a SIP profile is configured on a virtual server, undisclosed traffic can cause the Traffic Management Mic…
    CVE-2026-42930 (CVSS 8.5) — When running in Appliance mode, an authenticated attacker assigned the 'Administrator' role may be able to byp…
    CVE-2026-24464 (CVSS 6.9) — When running in Appliance mode, a directory traversal vulnerability exists in an undisclosed iControl REST end…
    CVE-2026-39458 (CVSS 8.7) — When a BIG-IP is configured with DNS caching (Such as a DNS profile with caching enabled, SSL Orchestrator, A…
    CVE-2026-41959 (CVSS 7.1) — Incorrect permission assignment vulnerabilities exist in BIG-IP and BIG-IQ TMOS Shell (tmsh) network diagnosti…
    CVE-2026-42406 (CVSS 8.5) — A vulnerability exists in BIG-IP and BIG-IQ systems where a highly privileged, authenticated attacker with at …
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    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High