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CVE-2026-78604— Incorrect Permission Assignment for Critical Resource in Elastic Agent Leading to Local Privilege Escalation to SYSTEM

Quick assessment

Affected
Elastic Elastic Agent
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Elastic Agent是荷兰Elastic公司开源的一个单一代理。可从每台主机收集日志、指标、跟踪、可用性、安全性和其他数据。 Elastic Agent 8.0.0版本至8.19.20版本、9.0.0版本至9.4.5版本和9.5.0版本至9.5.1版本存在权限许可和访问控制问题漏洞，该漏洞源于关键资源的权限分配不正确，在Windows系统非特权安装模式下，服务资源访问控制超出所需范围，可能导致本地用户利用该漏洞使服务执行任意代码，最终获取SYSTEM级权限。

CVSS 7.8 · High EPSS 0.15% · P4

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 3

VendorProduct Version RangeStatus
Elastic Elastic Agent 8.0.0≤ 8.19.20 affected
9.0.0≤ 9.4.5 affected
9.5.0≤ 9.5.1 affected
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I. Basic Information for CVE-2026-78604

Vulnerability Information
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Vulnerability Title
Incorrect Permission Assignment for Critical Resource in Elastic Agent Leading to Local Privilege Escalation to SYSTEM
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
关键资源的不正确权限授予
Source: CVE Program / CVE List V5
Vulnerability Title
Elastic Agent 权限许可和访问控制问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Elastic Agent是荷兰Elastic公司开源的一个单一代理。可从每台主机收集日志、指标、跟踪、可用性、安全性和其他数据。 Elastic Agent 8.0.0版本至8.19.20版本、9.0.0版本至9.4.5版本和9.5.0版本至9.5.1版本存在权限许可和访问控制问题漏洞，该漏洞源于关键资源的权限分配不正确，在Windows系统非特权安装模式下，服务资源访问控制超出所需范围，可能导致本地用户利用该漏洞使服务执行任意代码，最终获取SYSTEM级权限。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Elastic Elastic Agent 8.0.0 ~ 8.19.20 -

II. Public POCs for CVE-2026-78604

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III. Intelligence Information for CVE-2026-78604

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Vendor Advisories for CVE-2026-78604 (1)

Same Patch Batch · Elastic · 2026-09-02 · 15 CVEs total

CVE-2026-78590 7.3 HIGH Improper Limitation of a Pathname to a Restricted Directory in Kibana Leading to Unauthori
CVE-2026-78588 6.5 MEDIUM Allocation of Resources Without Limits or Throttling in Filebeat Leading to Denial of Serv
CVE-2026-78586 6.5 MEDIUM Allocation of Resources Without Limits or Throttling in Kibana Leading to Denial of Servic
CVE-2026-78599 6.5 MEDIUM Stored Path Traversal in Kibana Leading to Unauthorized Deletion of Internal Resources
CVE-2026-78591 6.3 MEDIUM Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') in Kibana L
CVE-2026-78601 5.5 MEDIUM Missing Authorization in Kibana Leading to Unauthorized Elasticsearch Index Data Exposure
CVE-2026-78609 5.4 MEDIUM Incorrect Authorization in Elastic Cloud on Kubernetes Leading to Unauthorized Modificatio
CVE-2026-78598 5.4 MEDIUM Incorrect Authorization in Kibana Leading to Unauthorized Cross-Space Exposure of Machine
CVE-2026-78602 5.3 MEDIUM Improper Limitation of a Pathname to a Restricted Directory in Elastic Maps Server Leading
CVE-2026-78594 4.9 MEDIUM Improper Handling of Highly Compressed Data in APM Server Leading to Persistent Denial of
CVE-2026-82293 4.3 MEDIUM Incorrect Authorization in Kibana Leading to Unauthorized Resource Consumption
CVE-2026-78584 4.3 MEDIUM Observable Response Discrepancy in Kibana Leading to Cross-Space Information Disclosure
CVE-2026-78600 3.5 LOW Incomplete Cleanup in Elastic Cloud on Kubernetes Leading to Unauthorized Cross-Namespace
CVE-2026-78587 3.1 LOW Incorrect Authorization in Fleet Server Leading to Denial of Service of Agent Upload Opera

IV. Related Vulnerabilities

Same product: Elastic Agent
Same vendor: Elastic
Same weakness: CWE-732

V. Comments for CVE-2026-78604

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