Vulnerability Description
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.
CVSS Score
MEDIUM
Related Weaknesses (CWE)
References
- https://github.com/Hackplayers/evil-winrm/commit/6ecd570a298562dc72ad73978307eb3
- https://github.com/Hackplayers/evil-winrm/pull/81
- https://www.vulncheck.com/advisories/evil-winrm-path-traversal-in-download-dir-f
FAQ
What is CVE-2026-55201?
CVE-2026-55201 is a vulnerability with a CVSS score of 6.8 (MEDIUM). 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 ...
How severe is CVE-2026-55201?
CVE-2026-55201 has been rated MEDIUM with a CVSS base score of 6.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-55201?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.