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Vulnerable Software

Vulnerability Details CVE-2026-78604

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.

Exploit prediction scoring system (EPSS) score

EPSS Score 0.001

EPSS Ranking 1.0%

CVSS Severity

CVSS v3 Score 7.8

References

https://discuss.elastic.co/t/elastic-agent-8-19-21-9-4-6-9-5-2-security-update-esa-2026-150/390109

Products affected by CVE-2026-78604

Elastic » Elastic Agent » Version: Any

cpe:2.3:a:elastic:elastic_agent:*
Elastic » Elastic Agent » Version: 8.0.0

cpe:2.3:a:elastic:elastic_agent:8.0.0
Elastic » Elastic Agent » Version: 8.15.0

cpe:2.3:a:elastic:elastic_agent:8.15.0
Elastic » Elastic Agent » Version: 8.15.4

cpe:2.3:a:elastic:elastic_agent:8.15.4
Elastic » Elastic Agent » Version: 8.6.0

cpe:2.3:a:elastic:elastic_agent:8.6.0
Elastic » Elastic Agent » Version: 8.9.2

cpe:2.3:a:elastic:elastic_agent:8.9.2
Elastic » Elastic Agent » Version: 9.5.0

cpe:2.3:a:elastic:elastic_agent:9.5.0

Vulnerabilities

Vulnerable Software

Vulnerability Details CVE-2026-78604

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