Is CVE-2026-39455 actively exploited?

No active exploitation of CVE-2026-39455 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-39455 be exploited remotely?

Yes. CVE-2026-39455 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-39455?

CVE-2026-39455 has a CVSS score of 7.5 (HIGH).

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HIGH

CVE-2026-39455

CWE-772Published: May 13, 2026· Updated: May 13, 2026

7.5

CVSS v3.1

EPSS:0.08%probability of exploitation in 30 daysPercentile:24.5th

Official Description

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.

NVD Source

Technical Analysis

CVE-2026-39455 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 7.5.