Is CVE-2026-78604 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-78604?

CVE-2026-78604 has a CVSS v3 severity of HIGH (7.8).

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CVE-2026-78604

Description

Incorrect Permission Assignment for Critical Resource (CWE-732) in Elastic Agent can lead to local privilege escalation via Replace Binaries (CAPEC-642). On Windows systems where Elastic Agent is installed in unprivileged mode, resources used by the agent service are created with access controls broader than required. A local user could take advantage of this to cause the service to execute code of their choosing, ultimately obtaining SYSTEM-level privileges on the host.