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CVE-2025-20386 is a high-severity local privilege-escalation weakness in Splunk Enterprise for Windows. In affected versions below 10.0.2, 9.4.6, 9.3.8, and 9.2.10, a new installation or upgrade can apply incorrect NTFS permissions to the Splunk installation directory. As a result, non-administrator local users may be able to access the directory and its contents, including binaries, configuration files, scripts, and other resources that should be restricted. The issue is caused by improper permission assignment during installation or upgrade, and is consistent with CWE-732. Supporting analysis indicates that if writable sensitive files in the installation path are later loaded or executed by Splunk services, an attacker can tamper with those resources to achieve privilege escalation.
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A vulnerability referenced as CVE-2025-20386. Details not specified in the content.
A local privilege escalation vulnerability in Splunk Enterprise for Windows caused by overly broad NTFS permissions on Splunk installation directories, allowing non-admin users to modify binaries/config/scripts that are executed by Splunk services running with elevated (LocalSystem) privileges.
A high-severity vulnerability in Splunk Enterprise for Windows where incorrect directory permissions during installation or upgrade allow non-administrator users local access to the installation directory and its contents, potentially leading to privilege escalation or unauthorized access.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
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Cross-references every affected SKU, including bundled OEM variants.
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