CVE-2026-55201
MediumCVSS 6.8Exploitation Probability (EPSS)
Low risk22th percentile - higher than 22% of all known CVEs
Summary
Evil-WinRM through version 3.9 contains a path traversal vulnerability in the download_dir() function, allowing a rogue or compromised remote Windows server to write files outside the intended download directory. Attackers controlling the remote server can exploit this to overwrite sensitive client-side files such as SSH authorized_keys or shell configuration files.
Risk Assessment
The risk for the organization is the potential for persistent client machine compromise or privilege escalation by overwriting critical configuration files from the remote server.
Recommendation
Immediately update Evil-WinRM to a version containing commit 6ecd570 or later, which fixes the vulnerability by properly sanitizing file paths.
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Original NVD description (English source)
Evil-WinRM through 3.9, fixed in commit 6ecd570, contains a path traversal vulnerability in the download_dir() function that allows a rogue or compromised remote Windows server to write files outside the intended download directory by returning filenames with traversal sequences from Get-ChildItem command output that are passed unsanitized to File.join(). Attackers controlling the remote server can exploit this to overwrite sensitive client-side files such as SSH authorized_keys or shell configuration files, achieving persistent access or privilege escalation on the client machine.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS