CVE-2026-78604
High
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.
SeverityHigh
CVSS7.8
Exploit probability—
ProductElastic Agent
PublishedSep 2, 2026
First seenSep 2, 2026
Weakness typeCWE-732CWE-732
How to fix
Update
- elastic elastic_agent8.19.21, 9.4.6, 9.5.2 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| elastic elastic_agent | 8.0.0 ≤ v < 8.19.21, 9.0.0 ≤ v < 9.4.6, 9.5.0 ≤ v < 9.5.2 | 8.19.21, 9.4.6, 9.5.2 |
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