Is CVE-2026-42409 actively exploited?

No active exploitation of CVE-2026-42409 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-42409 be exploited remotely?

Yes. CVE-2026-42409 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-42409?

CVE-2026-42409 has a CVSS score of 7.5 (HIGH).

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HIGH

CVE-2026-42409

CWE-476Published: May 13, 2026· Updated: May 13, 2026

7.5

CVSS v3.1

EPSS:0.08%probability of exploitation in 30 daysPercentile:24.2th

Official Description

When an HTTP/2 profile and an iRule containing the HTTP::redirect or HTTP::respond command are configured on a virtual server, undisclosed requests can cause the Traffic Management Microkernel (TMM) process to terminate. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

NVD Source

Technical Analysis

CVE-2026-42409 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.