WhatsUp Gold < 26.0.2 LogToFile Action Arbitrary File Extension Injection
CVE-2026-65939 Published on August 12, 2026
WhatsUp Gold versions prior to 26.0.2 contain an arbitrary file write vulnerability in the LogToFile action handler.
In WhatsUp Gold versions released before 2026.0.2, a privileged attacker can create a LogToFile action specifying an arbitrary file extension within the IIS web root.
Vulnerability Analysis
Weakness Types
What is an Unrestricted File Upload Vulnerability?
The software allows the attacker to upload or transfer files of dangerous types that can be automatically processed within the product's environment.
CVE-2026-65939 has been classified to as an Unrestricted File Upload vulnerability or weakness.
External Control of File Name or Path
The software allows user input to control or influence paths or file names that are used in filesystem operations.
What is a Directory traversal Vulnerability?
The software uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the software does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.
CVE-2026-65939 has been classified to as a Directory traversal vulnerability or weakness.
Products Associated with CVE-2026-65939
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Affected Versions
Progress Software Corporation WhatsUp Gold:- Before 26.0.2 is affected.