SB2025120434 - Privilege escalation in Splunk Universal Forwarder for Windows
Published: December 4, 2025
Security Bulletin ID
SB2025120434
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Incorrect permission assignment for critical resource (CVE-ID: CVE-2025-20387)
CWE-ID: CWE-732 - Incorrect Permission Assignment for Critical Resource
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due incorrect permissions assignment for Windows Installation directory (by default, C:\\Program Files\\SplunkUniversalForwarder) during new installation or upgrade. A local user on the machine can access the directory and all its contents.
Remediation
Install update from vendor's website.