Splunk U.F. Windows <10.0.2: Permission Disclosure via Improper ACL
CVE-2025-20387 Published on December 3, 2025
Incorrect permissions assignment on Splunk Universal Forwarder for Windows during new installation or upgrade
In Splunk Universal Forwarder for Windows versions below 10.0.2, 9.4.6, 9.3.8, and 9.2.10, a new installation of or an upgrade to an affected version can result in incorrect permissions assignment in the Universal Forwarder for Windows Installation directory. This lets non-administrator users on the machine access the directory and all its contents.
Weakness Type
Incorrect Permission Assignment for Critical Resource
The product specifies permissions for a security-critical resource in a way that allows that resource to be read or modified by unintended actors. When a resource is given a permissions setting that provides access to a wider range of actors than required, it could lead to the exposure of sensitive information, or the modification of that resource by unintended parties. This is especially dangerous when the resource is related to program configuration, execution or sensitive user data.
Products Associated with CVE-2025-20387
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Affected Versions
Splunk Enterprise:- Version 10.0 and below 10.0.2 is affected.
- Version 9.4 and below 9.4.6 is affected.
- Version 9.3 and below 9.3.8 is affected.
- Version 9.2 and below 9.2.10 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.