Authenticated code execution via apptemp file upload
Published Apr 15, 2026 · Updated Apr 15, 2026
Remote code execution in Splunk Web in Splunk Enterprise and Splunk Cloud Platform allows remote authenticated users to execute code. The upload path accepts a malicious file into $SPLUNK_HOME/var/run/splunk/apptemp, where insufficient temporary-file handling and isolation allow the file to reach execution. A low-privileged account without the admin or power role is sufficient, Splunk Web must be enabled, and user interaction is required.
Summary
What happened
Remote code execution in Splunk Web in Splunk Enterprise and Splunk Cloud Platform allows remote authenticated users to execute code. The upload path accepts a malicious file into $SPLUNK_HOME/var/run/splunk/apptemp, where insufficient temporary-file handling and isolation allow the file to reach execution. A low-privileged account without the admin or power role is sufficient, Splunk Web must be enabled, and user interaction is required.
The record
- CVE
- CVE-2026-20204
- Published
- Apr 15, 2026
- Updated
- Apr 15, 2026
- Vendor
- Zoom Video Communications, Inc.
- Product
- Splunk Enterprise
- Classifications
- CWE-377, T1190
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Apr 15, 2026CVE publishedPublication date reported by the CVE source.
- Apr 15, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=10.0 <10.0.5
- Affected versionversion=10.2 <10.2.1
- Affected versionversion=9.3 <9.3.11
- Affected versionversion=9.4 <9.4.10
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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